Protium
n. 三种氢的同位素中质量最轻者
🔁 扩展释义
【化】 氕【医】 氕(音撇)
🗣️ 情景例句
He needs to work.
他需要工作。
Don't be scared of him.
不要怕他。
The weather was very cold, and many people were ill.
天气非常冷，很多人生了病。