很多雄鸟进化出鲜艳的羽毛是为了吸引雌鸟。The bright plumage of many male birds has evolved to attract females.人类的进化the evolution of the human species陆栖动物据信由海栖动物进化而来.Land animals are believed to have developed from sea animals....
满眼金星乱转，而且越转越快。Stars appeared everywhere, spinning round and round, faster and faster.金星跟地球差不多一样大.Venus is of the same size as Earth.走出海淀不远,他眼前起了金星.Not far franc Haidian he started seeing stars....
He promised his mother on her deathbed that he would never marry.他向垂危的母亲保证他绝不结婚。Even though at their last gasp, the enemies will still put up their deathbed struggle.即使是奄奄一息, 敌人也还是要作垂死挣扎的.He forgave her on his deathbed ,...
他们围着老师的椅子站成半圆形回答问题。They stood in a semi-circle round the teacher's chair and answered questions.摆成半圆形的椅子a semicircle of chairs这个村庄是由半圆形的茅舍组成的.The village was formed of semicircle huts....
他所受到的严厉教养,影响了他对两性的态度.His attitude to sex is coloured by his strict upbringing.所有的两倍体种都是两性的,而且不是白花能稔,就是自花不稔.All diploid species are hemaphroditic and either self - fertile or self - sterile.分子兼有亲水的和疏水的两个基团,叫做两性的或两亲的.Molec...