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中国有句老话叫“万事俱备，只欠东风”——把“万事”备齐了，才能借“东风”。
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"But you must keep up the exercise regime. Because you're staying fit in space, not for space itself, but for when you return back to the punishing gravity environment of Earth. Those first two or three days back on Earth can be really punishing."
Exclusive: memo came after Mike Huckabee’s remarks about Israel sparked alarm inside White House