单词	PETN
释义	PETN noun ˌpē-ˌē-ˌtē-ˈen  : a crystalline ester C5H8N4O12 used as a powerful high explosive and medically in the treatment of angina pectoris … the experts determined that its explosive content was identical to that of the Honolulu bomb—PETN, an explosive undetectable by X-ray. Steven Emerson called also pentaerythritol tetranitrate Word History Etymology pentaerythritol tetranitrate First Known Use 1944, in the meaning defined above
随便看	loosen one's hold loosen someone's tongue loosen the purse strings loosen up loosened loosened (up) loosened up loosener looseners looseness loosenesses loosening loosening (up) loosening up loosens loosens (up) loosens up looser looses loosest loosestrife loosestrife family loosestrifes loosey-goosey loosing

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