Concurrent reaction
[化] 并发反应
🧩 词语组成解析
🗣️ 情景例句
Morning, Grandpa.
早安， 爷爷。
It is convenient to know the language.
掌握这门语言会带来方便。
In the beginning they used to carve Chinese characters on stones to record important dates in history.
开始时，他们常把汉字刻在石头上，记载历史上重要的日期。