Combustions
(combustion 的复数) n. 燃烧, 骚动\\n[化] 燃烧
🗣️ 情景例句
I didn't realize how late is was.
我不知道已经这么晚了。
Then, all of a sudden, it became cloudy and began to rain.
可是突然天就变了，乌云密布并下起雨来。
Can we substitute in these things?
这几项可以用替代品吗？