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誤用：He previously worked in the Ministry of Finance. He comes, therefore, with a great deal of experiences and expertises.

改為：He previously worked in the Ministry of Finance. He comes, therefore, with a great deal of experience and expertise.

說明：experience 表示“經驗”時，為不可數名詞，沒有復數形式；但表示“經歷”時，則可數。expertise（專門知識）也是一個不可數名詞，也沒有復數形式。

句意：他以前在財政部工作過。因此他來的時候已有豐富經驗和專門知識。

誤用：On their travels they indulged their hobby of collecting antique furnitures. As a result their home had become something of a museum.

改為：On their travels they indulged their hobby of collecting antique furniture. As a result their home had become something of a museum.

說明：furniture（家具）是一個典型的不可數名詞，沒有復數形式。

句意：他們在每次旅行時，盡興地滿足自己收集古董家具的嗜好。結果他們家成了類似博物館的地方。

誤用：Now supposing there was such a piece of stamp, and supposing it was worth a million dollars. And supposing the man who owned it suddenly came into possession of a second piece of stamp, its duplicate. What do you think would be the valve of each of those two pieces of stamp?

改為：Now supposing there was such a stamp, and supposing it was worth a million dollars. And supposing the man who owned it suddenly came into possession of a second stamp, its duplicate. What do you think would be the valve of each of those two stamps?

說明：stamp（郵票）是可數名詞，其前可直接用不定冠詞或數詞修飾，也可用復數形式，而不能借助 a piece of 表示“一張”。

句意：假定有這樣一張郵票，假定這張郵票值100萬美元。然后又假定這張郵票的主人一下子有了第二張郵票，即第一張郵票的復制品，你認為這兩張郵票各值多少錢？

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