查询词典 optional sampling

By 1937 Zeiss listed about 20 high quality monocular, binocular and stereo microscope configurations in their literature. And they also marketed a wide selection of optional attachments and illuminators including at least 33 objectives of from 2X to 120X, and about 20 eyepieces of Huygens, Orthoscopic, and Compensating designs of from 3X to 30X.

1937年，蔡司文献上就已经有了大约20种高品质单目望远镜、双目望远镜和立体显微镜，并且还有很多可选的光学配件，说明书中列出了至少33种2倍到120倍物镜（其中包括6种为使用萤石型），至少大约20种3倍到30倍的惠更斯型，无畸变型(直线型Orthoscopic)，和补偿型目镜。

This is optional, so don't need to worry.

这是可选的，所以不必担心。

It is optional with you.

那是你的自由。

I'm not planning to get it, because like you said, music is optional.

我不打算得到它，因为像你说的，音乐是可选的。

And, of course, everything will be optional.

当然，所有这些都将是可选的。

This step is optional, but it's good practice regardless.

这一步是可选的，但它的良好做法，不论。

This one or two women and one optional unit ...

这一个或两个妇女和一个可选的单位，。。。

Memory is optional, is not it?

记忆是可以选择的，不是吗？

I can improve the system if I want to, but that's optional.

如果我愿意我能改善这个系统，但那是可自由选择的。

Leaving your email is optional, and in any case, it will not be revealed.

离开您的电子邮件是可选的，在任何情况下，也不会透露。

Newly designed quick-refill fuel tank cap and dust proof radio box back-up their impressive form by also contributing to the low center of gravity.

新设计的快速填充油箱盖和防尘电台方块备份其令人印象深刻的形式也有助于低重心。

The book is a spin-off from his master's thesis.

这本书是他的硕士论文的派生作品。