Photomultiplier tube
[电] 光电倍增管
🧩 词语组成解析
n. 光电倍增管\\n[化] 光电倍增管
🗣️ 情景例句
I have to go out and hand out fliers.
我要出去派传单。
It's a shame this machine is so slow.
真遗憾，这台机器太慢了。
and a period (which is the time it takes a wave crest to travel one wave length).
和周期（浪峰走过一个波长所需的时间）。