Half-value layer(hvl)
[化] 半值层; 半值厚度
🧩 词语组成解析
half
[hæf]
adj. 一半的，半个的;
n. 半;一半;（啤酒等饮料的）半品脱;（比赛、音乐会等的）半场;
adv. 一半;部份地;
🗣️ 情景例句
It's so calming.
好宁谧 。
A covetous man is good to none but worse to himself.
贪婪的人对别人毫无好处，对自己却坏处更大。
It says here,on this card, that it was used in plays, said Meimei. it's a king's hat!
“这儿，这张卡片上说那是演戏用的，”梅梅说，“是国王的帽子！”