同根派生 post bag相关词英汉例句I myself put one letter in that famous bag just before the aeroplane went up, and that letter, which was addressed to my wife in London, reached her safely.正好在飛機起飛之前，我自己也往那個著名的郵袋裡投了一封寄給我在倫敦的妻子的信，信平安到達。post bag更多例句