double crossover

基本解釋

If you consistently over-reach on your backstroke pull, double-arm makes this very tough to do, because you have to cross your arms during the recovery to accomplish that.
如果你縂是在仰泳劃水的時(shí)候手臂過(guò)肩線，那麼這個(gè)雙臂練習(xí)就會(huì)讓你很難做到，因爲(wèi)你必須在移臂時(shí)手臂交叉才能做到那樣。
A series of double-blind, randomized, cross-over, healthy volunteer studies have been conducted to avoid the confounding effects on cognition such as those produced by changes in seizure frequency.
爲(wèi)了盡量減少如癲癇發(fā)作等其它因素對(duì)認(rèn)知功能的影響，既往完成了許多健康志願(yuàn)者蓡與的隨機(jī)雙盲交叉研究。

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