D-d mixture
[化] 滴滴混合剂
🧩 词语组成解析
🗣️ 情景例句
do I really have to
我是不是真的有必要
I know the boy whose father is an engineer.
我知道那个男孩的父亲是工程师。
In much of China, spring is usually very short.
在中国的许多地方，春天通常很短。