1·A device used to assist aim by guiding the eye, as on a firearm or surveying instrument.
通过引导眼睛以帮助瞄准的一种装置，如火器或测量仪器上的。
2·Automatically ejecting a shell and chambering the next round from the magazine; automatic or semiautomatic. Used of a firearm.
自动发射一颗炮弹，并将下一颗炮弹从弹仓中填入膛中的；自动的或半自动的用于火器。
3·Conclusion the firearm wounds with seawater immersion could aggravate the secondary injury of the tissue.
结论火器伤合并海水浸泡可加重组织继发损伤。
4·In the northern frontier defense of the Ming Dynasty, the disposition and use of the firearm underwent a rise and fall.
在明代北部边防中，火器的配备和使用经历了一个起伏的过程。
5·The first trial of the innovation ( specially firearm ) definitely fail.
第一次试验新发明（ 特别是火器） 肯定会失败。
1·The court documents also detail firearm thefts in British Columbia and “bare footprints consistent with those left by Harris-Moore at other crime scenes.
法院文件中还详细列举了他在不列颠哥伦比亚偷窃枪支，以及“其他与哈里斯-摩尔长相相似、赤足而行的犯罪现场证据。”
2·The Home Affairs Select Committee demand changes to firearm laws after exposing how nearly 5, 000 children-some as young as ten - are licensed to use guns Monday.
英国周一被揭露竟然有5000名青少年获得了持枪证，其中有些是只有10岁大的儿童后，英国内政事务特别委员会要求修改枪支管理法。
1·One witness said that the killer walked into an all-female dance class carrying a bag, turned off the lights, and opened fire from at least one firearm.
一位目击者称，凶手背着一个大包走进一间均为女性的舞蹈课，关了灯之后用至少一支枪射击。
2·On the day Duggan was shot, there is overwhelming evidence he had obtained a firearm, and there is video supporting that.
包括一段录像在内的大量证据显示当天达根获得了一支枪。
3·Assume every firearm is loaded.
假设每支枪都是上膛的。
1·If a dangerous weapon (including a firearm) was possessed, increase by 2 levels.
如果持有凶器(包括枪炮)，则增加2级。
2·If a dangerous weapon (including a firearm) was possessed in connection with the offense, increase by 2 levels. If the resulting offense level is less than level 13, increase to level 13.
如果罪行与持有凶器(包括枪炮)有关，则增加2级。如果最终罪级低于13级，则增加到13级。
3·If a firearm, destructive device, or controlled substance was taken, or if the taking of such item was an object of the offense, increase by 1 level.
如果使用枪炮、破坏性装置或受禁物品，或窃取这些物品作为犯罪目标，则增加1级。