Objectives which consist only of one lens can be used for visual and photographic observations . 由单透镜组成的物镜可作目视和照相观测用。
The disappearance of monomer droplets at the onset of interval iii can be observed visually . 在阶段开始时就可以目视观察到单体液滴的消失。
Visual instruments are designed with this in mind so that the eye need not strain unnecessarily . 设计目视仪器时要考虑到这一点,以免造成眼不必要的紧张。
We cannot expect to find out all there is to know in astronomy simply by making visual observations . 我们不能指望单单通过目视观测来发现天文学所要了解的全部天体。
Additional visual observations are usually in order to establish the advent of unsteady flow, intermittent stall, and full stall . 通常采用另外一些目视法来确定非常定流断续失速和全失速的出现。
We asked the post office to fault the telephones, and went in to make a visual inspection of the cipher room area . 我们让邮局给电话弄点儿故障,然后进入大使馆对密码室所在的位置作一番目视观察。
Colour grading of polished diamond by visual matching 钻石色级比色目视评价方法
Visual imperfections in rubber products - vocabulary 橡胶制品的目视可见缺陷.词汇
Visual inspection for silicon wafers with specular surfaces 镜面硅片的目视检查
I watched the car until it was out of sight 我目视着小车,直到它从视野里消失