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...
A methane molecule is composed of one carbon atom attached to four hydrogens.甲烷分子由1个碳原子与4个氢原子构成。Those that are aligned in the place are called equatorial hydrogens.那些在平面上定向的氢叫做平伏氢.Those that are aligned perpendicular to ...
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!...