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semtex

noun
/ˈsemteks/
/ˈsemteks/
[uncountable]
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  1. a powerful explosive that is used for making bombs, often illegally塞姆汀塑胶炸药(常用于非法制造炸弹)
    Word Origin1980s: probably a blend of Semtin (the name of a village in the Czech Republic near the place of production) and explosive.

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