大概直升機易學難精，飛機的降落較難，其它相對簡單。

來源: 狗肉於 2009-12-08 09:05:14 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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大概直升機易學難精，飛機的降落較難， 其它相對簡單。