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1·Old birds are not to be caught with chaff.

有经验的人不易受骗上当。《新英汉大辞典》

2·Fish is too clever to be caught with chaff.

鱼太聪明了，是不能用糠饵钓得到的。

3·Old birds are not to be caught with chaff .

有经验的人不易受骗上当。

4·Mr Adams is a shrewd man, he is not to be caught with chaff.

亚当斯先生是个机灵人，不容易上当。

5·Frederick the great is too old a bird to be caught with chaff.

腓德烈大帝是个不易上当的老奸巨滑。

6·Frederick the Great was too old a bird to be caught with chaff.

腓德烈大帝是个不易上当的老奸巨滑。