- 1
When something unwelcome — winter, rain, fear, tiredness, an illness — begins and looks like it will stay for some time. No object.
（壞天氣、壞狀況）來臨並持續
原始詞典資料1 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
set inverb
- 1
To take root, become established.
- That was the point at which the rot set in.
- [...] but rain set in, driven by a furious westerly gale, [...].
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。