Radioactivities
(radioactivity 的复数) n. 放射性\\n[化] 放射性
🗣️ 情景例句
Take care of yourself.
多保重。
I ate stream fish for lunch yesterday.
我昨天午饭吃的是清蒸鱼。
That's a big box. Is it heavy? Please let me help you.
这是个大盒子。重吗？让我来帮你。