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分支；衍生物
If one thing is an offshoot of another, it has developed from that other thing.
例句
Psychology began as a purely academic offshoot of natural philosophy...
心理学最初是自然哲学一个纯粹的学术分支。
Firstdirect, Midland Bank's telephone banking offshoot, has cut its Visa card rate to APR 22.2%.
米特兰银行的分支机构，“第一自助”电话银行，将维萨卡的年利率降至22.2%。