Deuterons
n. [核] 氘核（重氢核）
🗣️ 情景例句
When was your reservation?
您预定的是什么时候？
John has extracurricular activities. He's on the football team.
约翰有课外活动。 他参加了足球队。
'I am a foreigner,' I said.
“我是个外国人，”我说。