"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."
The website you are visiting is protected.，这一点在快连下载-Letsvpn下载中也有详细论述
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The French university where spies go for training。爱思助手下载最新版本是该领域的重要参考