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重點講解：
1.attribute to 歸因于；把…歸因于；歸咎于
例句：The former she hoped at last might have been accidental, and the latter she could only attribute to her own stupidity.
對于前者，她最終希望或許是偶然現象，對于后者，她只能歸咎于她自己太愚鈍。
2.take up to 需要
例句：However, any agreement could take up to a year to finalise.
然而，最終敲定協議可能需要一年時間。
3.be beneficial to 對…有益；有利于；對…有利
例句：Advertising can be beneficial to the customers if it is true to its claims.
廣告如果名副其實，對消費者是有益的。
4.expand on 詳述；闡述；細說
例句：I'll expand on this problem at the next meeting.
我將在下次會議上詳談這個問題。
