set.off
setoff的音标和读音：
DJ音标发音： [ˈsetˌɔ:f, -ˌɔf]
KK音标发音： [ˈsɛtˌɔf, -ˌɑf]
setoff的词性：
n.（名词）
1. Something, such as a decoration, that sets off something else by contrast.
衬托物：通过对比衬托他物的东西，如装饰品
2. Something that offsets or compensates for something else; a counterbalance.
补偿物：抵消或补偿其它事物的东西；抵消
3. A counterclaim.
反诉
4. Settlement of a debt by a debtor's establishing such a claim against a creditor.
反诉抵偿：由债务人对债权人提起反诉而清算债务
5. Architecture A flat projection, as from a wall; a ledge.
【建筑学】 突出物：平面突出物（如在墙上的）；架状凸出物