The French scientists Becquerel had already found that the salts of uranium had some light - giving properties.法国科学家贝克勒尔早已发现铀中的盐含有某种发光的物质.Becquerel had discovered the fact that this strange radiation existed in the world...
She described the degradations she had been forced to suffer.她描述了自己被迫经受的屈辱。The researches of the thermal and photo degradations of aramid fibers are systematically discussed.摘要阐述了芳纶的热、光老化降解研究的进展情况.The microbial and oxida...
They were principally used to catalyze aldol, allylation, Diels - Alder, ene and Friedel - Crafts reactions.它们主要被用来催化Aldol, 烯丙基化, Diels-Alder, Ene和 Friedel -Crafts等反应.They are highly specific for the reactions that they ...
They were both virgins when they met and married.他们从相识到结婚前都未曾经历男女之事。The virgins at sight of him fled in all directions.少女们看到他都四处奔逃.Now, we won't submit to impertinence from these pimply, tipsy virgins.现在我们决不能忍受这群长着脓...
Aphid count on plants in fields do not correlate with virus spread in the same fields.田间植株蚜数与同块田内病毒的扩散程度间无相关性.Since aphid population may become resistant to organophosphorus compounds, avoid excessive spraying.因为蚜虫类对有机磷化...