Cesium hollow cathod
[电] 空心阴极
🧩 词语组成解析
n. 铯\\n[化] 铯Cs
hollow
['hɑlo]
adj. 空的;空洞的;虚伪的;空腹的;
n. 洞，坑;山谷;
vt.& vi. 挖空（某物），变空;挖出（孔、洞）;
adv. 完全，彻底;
🗣️ 情景例句
It hurts so much when a baby gets his first teeth.
小孩子长第一颗牙齿时好痛哟。
He is a good friend that speaks well of us behind our backs.
背后说人好话的够朋友。
What are your plans for the weekend?
你周末计划做什么？