sight bead (瞄准用); front sight (of a gun)标准星: standard star单准星: single-pin sight多准星: multi-pin sight脚准星: foot marker瞄准星: sight bead下载手机词典可随时随地查词查翻译关注微信公众号:chachacidian,回复:准星,即可在微信中查询翻译