Animals use a whole rang of acoustic, visual, and chemical signals in their systems of communication.动物利用各种各样的听觉、视觉和化学信号来进行交流。She was backed by acoustic guitar, bass and congas.原声吉他、贝斯和康茄鼓为她伴奏。The disturbance is sound wa...
很多公路桥的桥墩是从河谷里建造起来的.Most road bridges have piers rising out of the vally.桥墩的受力会把它们压到水面以下的.Those piles of yours could be hammered below water level before they'd hold.既然如此, 防 撞击桥墩垮塌的设计尤其显得重要.That being the case, anti ...
His results are likely to reopen the debate on race and education.他的结果可能会重新引起关于种族和教育的辩论。He gambled all his winning on the last race.他把所有赢得的钱都押在最后一场比赛上.It's an ancient artefact, probably made by the other alien race....