面对海南自由贸易港即将实施封关运作，习近平总书记叮嘱：“脚要踩在大地上。我们干任何事情都有内在规律。要科学有序安排开放节奏和进度，稳扎稳打、步步为营，力求‘放得活’又‘管得好’。”
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Nasa was targeting March for the launch, but its plans were delayed after a helium leak was discovered on the Space Launch System (SLS) rocket.
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（四）代替他人或者让他人代替自己参加考试的。