硅结砾岩

So the researchers set up a fire pit and buried a silcrete sample at high temperature.

因此研究者们建立起一个火坑，然后把一个硅结砾岩样品埋进去。

The silcrete found at archaeological sites was glossy with a fine grain and a reddish color.

在南非的考古地点发现的硅结砾岩很光滑，带有细致的颗粒，呈红颜色。

About 72,000 years ago, our ancestors along coastal South Africa made tools from silcrete, a cement-like layer of soil.

大约7万2千年以前，在南非的沿海地带，我们的祖先用硅结砾岩制造石头工具。

Then a colleague from Arizona State University remarked that a piece of silcrete reminded him of heat-treated tools in the Southwest.

随后一名来自亚利桑那州立大学的同事说，硅结砾岩使他想起了南非西南部地区的热处理过的石器。

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。