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牛犇（Neil Thomas）在郵件中分析，官方公告稱，張又俠和劉振立是「經黨中央研究」後被清洗的，據他所知，這種措辭在軍隊清洗公告中是前所未有的。這暗示了習近平本人異常高度的介入，考慮到撤換軍委最高級別作戰指揮官的敏感性，這是合乎邏輯的。
。新收录的资料是该领域的重要参考
Mr Lemmens said that future spacecraft "should be designed in such a way that they can take themselves out of orbit safely, preferably by doing controlled re-entries".
Again, to understand the class distribution of the various sports, one would have to take account of the representation which, in terms of their specific schemes of perception and appreciation, the different classes have of the costs (economic, cultural and ‘physical’) and benefits attached to the different sports—immediate or deferred ‘physical’ benefits (health, beauty, strength, whether visible, through ‘body-building’ or invisible through ‘keep-fit’ exercises), economic and social benefits (upward mobility etc.), immediate or deferred symbolic benefits linked to the distributional or positional value of each of the sports considered (i.e., all that each of them receives from its greater or lesser rarity, and its more or less clear association with a class, with boxing, football, rugby or body-building evoking the working classes, tennis and skiing the bourgeoisie and golf the upper bourgeoisie), gains in distinction accruing from the effects on the body itself (e.g., slimness, sun-tan, muscles obviously or discreetly visible etc.) or from the access to highly selective groups which some of these sports give (golf, polo etc.).