11月28日晚间,嫦娥五号探测器经由四天多的奔月航行,乐成实行近月制动,顺遂进入环月轨道。近月制动是月球探测器航行过程中要害的轨道控制之一。高速航行的探测器在靠近月球时,实行“刹车”制动,目的是使其相对速度低于月球逃逸速度,从而被月球引力捕捉。(胡喆、段逊)
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回复KUALA LUMPUR: Sime Darby Bhd is letting go of its Weifang Port companies for a fair price, said AmInvestment Bank Research, as the trading conglomerate continues to unwind its presence in non-core businesses.有一说一,我很中意