The separation of the optic isomers of a rice paddy herbicide naproanilide was studied by high-performance liquid chromatography.
采用高效液相色谱法分离水田除草剂萘丙胺光学异构体。
Tending a rice paddy required working up to 3,000 hours a year, and it left a cultural legacy that prizes industriousness.
种一块稻田需要一年3000小时的劳作,留下的是一份奖励勤劳的文化遗产。
IMAGINE a small group of farmers tending a rice paddy some 5,000 years ago in eastern Asia or sowing seeds in a freshly cleared forest in Europe a couple of thousand years before that.
试想一下,5000年前的东亚一群农民在耕种稻谷或是在更早几千年前的欧洲一片刚开垦的森林里播种的情景。