层积云

Along its eastern margin rises the mighty Sierra, miles in height, reposing like a smooth, cumulous cloud in the sunny sky, and so gloriously colored, and so luminous, it seems to be not clothed with light, but wholly composed of it, like the wall of some celestial city.

山谷东部边缘上耸立着数英里高的谢拉山，它气势磅礴，横卧在山谷边上，犹如停留在晴空中的一块平静的积云。它的色彩是那么壮丽辉煌，那么灿烂夺目，不由地使人感到它不是披上了一层金光，而本身就是一团光，像天国的城墙一般放射出万道光芒。

Study of the causes of MCS intensification and rainstorm shows that( 1) just before the heavy rains occur, there are high temperature, considerably wetness and unsteady convective stratification in the air over the rainstorm-hit area, in addition to significant increase in convectively efficient potential energy, condensation height and decrease in the height of free convection – all these favor the happening of the heavy rain,(2) the mergence of meso-βcloud clusters leads to the MCS such fast growth as to produce rainstorm,( 3) the two lines of cumuli in the north and west correspond, separately, to two convergences on the surface wind field, with stronger convergence at their meeting point responsible for such intense development of meso-βcloud cluster as to bring about torrential rains.

分析MCS加强和产生暴雨的原因表明，首先，暴雨发生前夕暴雨区域具有高温、高湿和对流性不稳定层结，并存在明显的对流有效位能增加、抬升凝结高度及自由对流高度降低的现象，有利于暴雨发生。第二，β中尺度云团之间的合并，使MCS迅速增长，产生暴雨。第三，北、西两条积云线分别与地面风场中的两条辐合线相对应，在它们交汇处的较强辐合导致β中尺度云团强烈发展产生暴雨。

Along its eastern margin rises the mighty Sierra, miles in height, reposing like a smooth, cumulous cloud in the sunny sky, and so gloriously colored, and so luminous, it seems to be not clothed with light, but wholly composed of it, like the wall of some celestial city.

山谷东部边缘上耸立著数英里高的谢拉山，它气势磅礡，横卧在山谷边上，犹如停留在晴空中的一块平静的积云。它的色彩是那麽壮丽辉煌，那麽灿烂夺目，不由地使人感到它不是披上了一层金光，而本身就是一团光，像天国的城墙一般放射出万道光芒。

Along its eastern margin rises the mighty Sierra, miles in height, reposing like a smooth, cumulous cloud in the sunny sky, and so gloriously colored, and so luminous, it seems to be not clothed with light, but wholly composed of it, like the wall of some celestial city.

山谷东部边缘上耸立着数英里高的谢拉山，它气势磅礡，横卧在山谷边上，犹如停留在晴空中的一块平静的积云。它的色彩是那麽壮丽辉煌，那麽灿烂夺目，不由地使人感到它不是披上了一层金光，而本身就是一团光，像天国的城墙一般放射出万道光芒。

High wispy clouds are called cirrus (from the Latin word for curl of hair); sheet like clouds are called stratus; billowing, puffy clouds are called cumulus; and rain-producing clouds are called nimbus.

很高的很薄的云叫卷云（拉丁词cirrus，表示curl of hair卷的头发的意思；片状的云叫层云（拉丁词stratus，表示layer层的意思；翻滚的大片的云叫积云（拉丁词cumulus，表示heap堆的意思）；产生雨的云叫雨云（nimbus，表示rain雨的意思）。

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。