当扩展时，阻流门阻止风扇排气，迫使空气反向通过级联段。
When extended, the blocker doors block the fan exhaust, forcing air in the reverse direction through the cascade segments.
阿尔沙文先前承认他想去西班牙，不过他并没有关上去其他高级联赛的门。
Arshavin previously admitted he wanted a move to Spain but he hasn't closed the door on a move to the Premier League.
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