- 重点词汇
- wasv. 用来表示某人或某物即主语本身，用来表示某人或某物属于某一群体或有某种性质（ be的过去式 ）;在，存在;不受干扰;
- covariancen.协方差;
- herbiciden.除草剂;
- data from[计][NT]数据源;
- analysisn.分析，分解;梗概，要略;[数]解析;验定;
- used to过去经常，曾经;
- analyzevt.<美>分析;分解;解释;对…进行心理分析;
- rapeseedn.油菜籽;油菜籽，;菜子;
- efficacyn.功效;效力;效验;生产率;
- experimentsn.实验( experiment的名词复数 );试验;尝试;实践;
- 相关例句
Arsenic is widely associated with the manufature of herbicides and pesticides.
砷广泛地应用于除草剂和杀虫剂的制造中.
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Poisons that generally affect only unwanted plants, or weeds, are called herbicides.
那些只抑制多余植物或杂草生长的药被称为除草剂.
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Scientists have known for years that weeds develop resistance to herbicides.
科学家们早在几年前就了解到杂草对除草剂产生了抗体.
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Among the many regulatory substances in use we have controllable and selective herbicides.
在所有的许多调节物质中,有控制性的和选择性的除草剂.
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Phenylcarbamate herbicides were among the earliest herbicides developed.
氨基甲酸苯酯除莠剂是发展最早的一种除莠剂.
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Herbicides provide a cheaper and more effective means of controlling weeds than cultivation.
除草剂比清耕消除杂草成本低,效率高.
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包括人在内的一些动物是杂食动物,既吃肉类,也吃蔬菜; 而其它动物则或是食肉动物,或是食草动物.
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For herbivorous animals, feeding a variety of grasses, moss and grass surface leaves.
为草食动物, 取食多种禾草 、 苔草及新鲜树叶.
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食草类的鸟足类恐龙可能发青有与哺乳动物一样的横隔膜,以便于有效的呼吸.
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