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重點講解：
1. be involved in 卷入的；參與的；與…有密切關聯的；
She has been involved in the war against organised crime.
她參與了打擊有組織犯罪的斗爭。
2. carry out 實施；執行；實行；
The operator has to be able to carry out routine maintenance of the machine.
操作員必須能對機器進行日常維護。
3. end up 最終；結果；到頭來；
He never dreamed that he would end up owning such a lot of property.
他做夢也沒想到他最后會擁有這么一大筆財產。
4. differentiate between 區分；區別；辨別；
A child may not differentiate between his imagination and the real world.
兒童可能無法將自己的幻想與真實世界區分開來。
