Apertometer
数值孔径计, 数值口径计, 物镜口径计, 开角机
🔁 扩展释义
【医】 物镜口径计
🗣️ 情景例句
Be on your guard.
你要提防着点儿。
Water dropping day by day wears the hardest rock away.
水滴天天滴不停，石头最坚也磨损。
Then knowledge began to be accumulated according to a systematic plan.
于是，知识便开始有系统有计划地积累起来。