Penetron tube
[计] 射线穿透管
🧩 词语组成解析
n. 介子
🗣️ 情景例句
He's always in and out of jobs.
他老是跳槽。
The farthest way about is the nearest way home.
欲速则不达。
I'll see you at six.
我六点钟见你。