在特殊的酸催化中, 不离解的酸不起作用.In specific acid catalysis, the undissociated acids do not contribute.所有的原子和分子系统都受光致电离和光致离解的影响.All the atomic and molecular systems are subject to photoionization and photodissociation.后者是由二氧杂环戊烷中活化较弱...
生物班的学生研究了果蝇的繁殖.The biology class studied the generation of fruit flies.射线对于果蝇的遗传产生强烈的作用.Radiation has a strong effect on the heredity of fruit flies.果蝇的一种实验品系,翅膀缩小,称为残翅.One laboratory stock of Drosophila melanogaster has...
他们说着荤段子，哼着不着调的小曲儿。They told dirty jokes and sang raucous ballads.她哼着一支欢快的小曲儿。She was humming a merry little tune.俺这阵儿和鸟儿一样,满肚子的小曲儿.I'm as full of notes as a bird now!...