optical approach学: study; learn仪器: instrument; appliance; appar ...接近: be close to; near; approach军用光学仪器: military optical instrument; military telescope医用光学仪器: medical optical i trument; medical optical instrument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:用光学仪器接近，即可在微信中查询翻译
