例句：

　　The main course was roast duck.

　　主菜是烤鴨。

　　She chose a bench beside the duck pond and sat down.

　　她選了鴨池旁的一張長椅坐了下來。

　　The cat was now within striking distance of the duck.

　　此時，貓就在可攻擊鴨子的距離內(nèi)。