Monochromators
(monochromator 的复数) n.[物]单色器, 单色仪, 单色光镜
🗣️ 情景例句
and the company in Los Angeles
而在Los Angeles
Nothing down, nothing up.
没有落就没有起。
With all these mouths to feed, he didn't know what to do.
由于有那么多人要供养，他不知道怎么办才好。