平潮

The geoid is used to be regarded as the theoretic global vertical reference .The actual national height references are regional mean sea levels determined by tide gauge station. The difference between them is apparent. The satellite altimetry has developed as a kind of important space geodetic technique since 1970s.

大地水准面作为全球高程测量的理论基准面，在现实工作中，国家或者地区高程系统的起算面是利用验潮方法来确定局部平均海平面的，两者之间的差距是显而易见的。

Here the soft sand tidal flat, the distribution of most of the Beidaihe Beach is a place where most tourists.

这里沙软潮平，分布着北戴河大多数的海滨浴场，是游人最多的地方。

Here beach, soft sand tidal flat, wide and clear water beaches, tidal stability, the wind cool clean, unique beach were many tourists praise as "best in the world bath."

这里的海滨，沙软潮平，滩宽水清，潮汐稳定，风爽无尘，海水浴场得天独厚，被众多的旅游者称颂为&天下第一浴&。

A pleasant climate here, twenty years long, tortuous flat sandy beaches, soft sand tidal flat, backed by lush trees in conjunction Mineyama, the beautiful natural landscape.

这里气候宜人，二十里长、曲折平坦的沙质海滩，沙软潮平，背靠树木葱郁的联峰山，自然环境优美。

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。