He will be difficult to replace when he leaves.
他离开后，他的位置很难有人接替。
Lee, however, would find it more difficult to replace his soldiers.
然而，李发现置换自己的士兵更为困难。
It could be a chance for somebody to really make a name. It's difficult to replace a player of Torres's quality but now we will see if they have the character.
这可能是另外的人成名的机会，替代托雷斯这样有实力的球员确实非常难，但是现在我们看重他们是否有斗志。
A unique program is both difficult and expensive to replace.
独一无二的软件程序更换起来既困难又昂贵。
A unique program is both difficult and expensive to replace.
独一无二的软件程序更换起来既困难又昂贵。
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