n.被選出或采摘之物；挑選

動(dòng)詞cull的現(xiàn)在分詞形式.

The mathematicians turned to culling periodic solutions. 數(shù)學(xué)家們轉(zhuǎn)而去挑選周期解。

Culling stem cells destroys the days-old embryo harboring them, regardless of whether it was cloned or left over in a fertility clinic. 一般來講，無論是被克隆還是被轉(zhuǎn)移到其他環(huán)境中，挑選干細(xì)胞線將會(huì)自動(dòng)破壞曾經(jīng)養(yǎng)育它的胚胎。

雙槳式劃水(仰臥水面, 兩腳并攏, 兩手放身旁劃水并帶出水和入水動(dòng)作)