Such detergents do not yellow the wool as alkali tends to do.这种洗涤剂不会象碱那样使羊毛发黄.Development of detergents has required optimization of the surfactants structure.发展洗涤剂时,要求使用最恰当的表面活性剂结构.They may be solubilized by detergents ...
草在风中起伏波动.The grass waved in the wind.我们很快看到一片麦田在微风中起伏。We soon see a field of wheat undulating in the breeze.我们很快看到一片在微风中起伏的麦田.We soon saw a field of wheat undulating in the breeze....
Parents will be able to discuss their child's progress with their teacher...家长将可以和老师交流谈论子女的进步情况。He has transformed Chicago's sink schools into beacons of hope for parents and children.他已经将芝加哥的几所条件不好的学校彻底变成了为家长和...