set in phrasal verbphr v START TO HAPPEN, EXIST ETCif something sets in, especially something unpleasant, it begins and seems likely to continue for a long time 〔尤指不愉快的事〕开始,来临 Winter seems to be setting in early this year. 今年的冬天好像来得早。
Further economic decline set in during the 1930s. 20世纪30年代出现了进一步的经济衰退。
set in• The doctors operated immediately to prevent any infection setting in.• Worldwide economic recession set in during the early 1980s.• It looks as if the rain has set in for the day.
→ set in at set1(PHRASAL VERB)