[摄] 光圈数
the ratio of the focal length to the diameter of a (camera) lens system
同义词： focal ratio / f number / speed
光圈号数
光圈数
孔径挡板，孔径数
站号
... 战略政策声明 strategic policy statement 站号 stop number 站名 sto name ...
... filler tube 放油螺塞 stop number 站牌 potentiometric titration 均衡回流沸点 ...
... f-number n. 【摄影】光圈数。 stop number 光圈数; 孔径档数 stop-number 光圈号数 ...
A large opening (small f-stop number) gives you a very shallow DOF, and a small opening (big f-stop number) gives you a much deeper DOF.
一个大洞的开启(小f值)会带给你浅度景深，而一个小的开启(大f值)则会给你一个深度景深。
He urged the states, for example, to stop restricting the number of charter schools.
比如，他还鼓励各州撤销对特许学校数量的限制。
The number of stop bits for communication between the host and the device under test.
主机和测试设备之间的通信的停止位数。
The truce did not last long. In the weeks that followed, a number of attempts were made to stop or arrest the leaders of the Free State government.
VOA : special.2009.05.07
Today,the number is still 40 percent. Part of the problem is that a number of big importers, such as China and Japan, are not doing enough to stop the import and sale of illegal timber.
VOA : standard.2010.07.28
We'll think about it in section, how you don't need to vaccinate everybody, but you just need to vaccinate a critical number in order to stop the disease from progressing through a community.
我们在讨论会上讲这个,为什么不需要给每个人都接种,但你只需要让接种人数达到一个临界值,就能阻止这个疾病在社会中传播
生物医学工程探索课程节选 : 耶鲁公开课
The demand for a free service, by Tory health speaker Jackson Carlaw, comes as Westminster moves to introduce a free, one-stop number in England and Wales.
He said gritters were eventually sent out but it was too late to stop a number of crashes across the county.
Ben Cairns almost exploited a slip by McFadden but the Leinster centre chased back to stop his opposite number from crossing the line.