natural selection什么意思解释？

the theory of natural selection, first propounded by Charles Darwin查尔斯∙达尔文首先提出的物竞天择理论Natural selection ensures only the fittest survive to pass their genes on to the next generation.自然选择确保只有最适应环境的物种得以存活下来，把基因传给下一代。All ba...

natural selection的音标：natural selection的英式发音音标为：['nætʃərəl si'lekʃən]natural selection的美式发音音标为：['nætʃərəl sɪ'lɛkʃən]...

“主顾”的拼音为：zhǔ gù...

aimless的近义词/同义词有：inconstant, desultory, irresolute, unsteady, variable, vacillating, unsure, fitful, indecisive, changeable, wayward, unreasoning, unpredictable, undecided, erratic, mutable, irregular, haphazard, acciden...

“缄口”的近义词/同义词：闭口, 箝口, 钳口。...

黑色黄疸，温克耳氏病...

a cheap showy rhinestone bracelet廉价艳丽的水晶手镯Black - eyed gipsy girls, hooded in showy handkerchiefs, sallied forth to tell fortunes.黑眼睛的吉卜赛姑娘, 用华丽的手巾包着头, 突然地闯了进来替人算命.They were smart but not showy.他们衣着讲究但不惹眼。Begonias are pr...

今天是 愚人节.Today is April Fools'Day .是的.我们有感恩节 、 劳动节,以及愚人节.Yes, we have Thanksgiving Day, Labor Day and April Fool's Day.愚人节在四月一号.April Fool's Day is on April 1....

picnicked的音标：...

n.异族结婚，近亲结婚...

dichloroether的音标：dichloroether的英式发音音标为：[daɪklə'ru:ðər]dichloroether的美式发音音标为：[daɪklə'ruðər]...

n.洗液，洗剂，护肤液，乳液...

psyche的复数形式为：psyches...

“不够”的近义词/同义词：不敷, 不足。...

oil的一般过去时为：oiled...

朱砂...