Optical thickness
[化] 光学厚度
🧩 词语组成解析
🗣️ 情景例句
lots of things to do.
许多事情要做。
If you consider that she's only been studying English a year, she speaks it very well.
你可以考虑到她那学一年的英语，她的英语说得非常好。
It is also useful for sending pictures, designs, maps and so on.
传真机也可以用来发送图片、地图等。