急流

While not shown in CIRA-86, there is a clear easterly band extending from the equator to high latitudes at the altitude of lower thermosphere in autumn.

在冬季，东亚区域中间层西风急流中心位于25°N-35°N之间的75km高度，与CIRA-86相比，该中心纬度偏南5°，高度偏高10km；在秋季，东亚区域低热层高度存在一个显著的从赤道到高纬度的东风带，而CIRA-86不存在。

In the region, the winter mesospheric westerly jet lies at 75km altitude and in between 25°-35°N, which is 10km higher and 5°farther south in latitude that of the CIRA-86. While not shown in CTRA-86, there is a clear easterly band extending from the equator to high latitudes at the altitude of lower thermosphere in autumn.

在冬季，东亚区域中间层西风急流中心位于25°-35°N之间的75 km高度，与CIRA-86相比，该中心纬度偏南5°，高度偏高10km；在秋季，东亚区域低热层高度存在一个显著的从赤道到高纬度的东风带，而CIRA-86不存在。

The result showed that the strong storm followed by mesoscale squall line was primary cause of strong sandstorm producing, steps and ladders short wave trough of 500 hPa was great criterion triggering system for the mesoscale squall line producing, the essential dynamic condition was provided by distortion field and the mesoscale low pressure of 700 hPa for the strong sandstorm forming and maintaining in mid-west of Hexi Corridor, the deep vertical circulation development condition was basic power that urged squall line to occur and sand dust to curl up, which was provided for the deep convection development by superimposition of lifting movement before ground cold front and ascendant current of secondary circulation in upper air jet entrance region, temperature and the barometric gradient around the cold front was enlarged by enhancement of ground thermal low and temperature diurnalvariation of afternoon, by which essential thermal energy unstable condition was provided for the gale and strong sandstorm eruption, the strong sandstorm appeared in downstream of -200 m^2s^(-2) center of vertical helicity, the vertical helicity had good instruction significance for development of squall line and landing region of sandstorm, the mesoscale squall line occurred in unstable stratification, basic condition of potential energy transforming as kinetic energy was provided by strong unstable stratification for the strong sandstorm forming and developing.

结果表明：中尺度飑线所伴随的强风暴是产生强沙尘暴的主要原因；500 hPa阶梯短波槽是中尺度飑线产生的大尺度触发系统，河西走廊中西部700 hp变形场、中尺度低压为强沙尘暴形成和维持提供了必要的动力条件；地面冷锋前上升运动与高空急流入口区次级环流的上升气流的叠加，为深对流发展提供了深厚的垂直环流发展条件，是促使飑线发生和沙尘卷起的基本动力；地面热低压的加强和午后气温的日变化加大了冷锋前后的温度和气压梯度，为大风、强沙尘暴爆发提供了必要的热力不稳定条件；强沙尘暴出现在垂直螺旋度为－200平方公尺/s^2中心的下游，垂直螺旋度对飑线的发展和沙尘暴的落区具有较好的指示意义；中尺度飑线发生在不稳定层结内，较强的不稳定层结为强沙尘暴形成、发展提供了位能转化为动能的基本条件。

However, the latter more complicated, contrasted between radar data and routine observatory data. It can be seen that the classification of the storm rainfall echo according to 850hPa effective system is more ideal, the storm rainfall echo is classified into storm rainfall of trough and storm rainfall of shear line, while storm rainfall of shear line includes storm rainfall of warm shear line and storm rainfall of cold shear line, and their radar echo features are investigated. It is shown that different storm rainfall style is distinct clearly on the echo structure and feature.

而伴有低空急流暴雨的回波特征较复杂，通过对雷达资料及常规观测资料的对比分析，发现利用850hPa的影响系统对暴雨回波分类比较理想，将暴雨过程分成低槽暴雨和切变线暴雨回波两类，切变线暴雨又可以分为冷式切变线暴雨和暖式切变线暴雨，分别分析、研究了不同类型暴雨的多普勒天气雷达回波特征，结果表明不同类型暴雨的回波结构和特征具有明显的区别。

Amongst the most outrages things I have done in adventure races was to abseil 2 rope length (that's almost 200meters) in the middle of the heavy downpour looking over the Kinta Valley, Flying Fox inside Gua Kandu at breakneck speed, river boarding down Sungai Kinta with class 3 rapids and hoping no monitor lizards would come nibbling your toes, caving in total darkness and submerging 90% inside the cave's river system to get to the other side.

其中最暴行，我在冒险的比赛做的事情是绕绳下降2绳的长度（即几乎二○○米在倾盆大雨中）偷看卦Kandu在近打谷，飞狐以惊人的速度，河登机双溪近打下来的第3类急流，希望没有巨蜥会来蚕食你的脚趾，在完全黑暗的洞穴探险和淹没洞内的水系90％到达对方。

Meantime, continuation of low tropospheric jet produces plentiful vapor for formation and continuation of rain gush.

同时，低空西南急流的维持，为暴雨的产生和维持提供了充足的水汽。

A mountain biker makes his way over Black Rapids Glacier in the Alaska Range.

一辆山地自行车使他的道路越过黑急流冰川在阿拉斯加山脉。

A mountain biker makes his way over Black Rapids Glacier in the Alaska Range.

一位骑山地自行车人走他的路越过黑色急流冰川在阿拉斯加山脉。

A mountain biker makes his way over Black Rapids Glacier in the Alaska Range.

一位骑山地自行车人用他的方法越过黑急流冰川在阿拉斯加山脉。

After dark, I said maybe we should save the spot for another trip to Cedar Rapids, Iowa.

天黑以后，我说，或许我们应该保存现场再次访问雪松急流，艾奥瓦。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。