甲壳虫把粪粒埋起来,然后在里面产卵.Beetles bury pellets of dung and lay their eggs within them.杜鹃在别的鸟巢中产卵.The cuckoo lays its eggs in other birds'nests.昆虫以产卵繁殖后代.Insects propagate themselves by means of eggs....
愈来愈深的分歧使不同的年龄群互相分离.Increasingly deep cleavages separate one age group from another.使不同温度的物体相接触.Bodies at different temperatures are placed in contact.要注意确定最适的害虫种群,使不同的遗传型能够辨别.Attention must be given to identifying the op...
Phenyl ( or polyphenyl ) substituted epoxides serve as excellent precursors to phenyl ( or diphenyl ) carbenes.某些苯代 ( 或多苯 ) 环氧乙烷是制取带苯环 ( 或二苯 ) 碳烯的极好原料.The epoxides were obtained with up to 90 % yields in the reaction sys...
The seagulls swirled in aerial combat over the barges.海鸥盘旋在驳船上方，展开空中的搏斗。a flock of seagulls一群海鸥Seagulls followed in the wake of the huge ship.海鸥尾随于大船之后....