set in

(of rain, bad weather, infection, etc) begin and seem likely to continue （指雨、 坏天气、 传染等）开始并可能继续下去: I must get those bulbs planted before the cold weather sets in. 我得在天气转冷之前把这些球茎秧种上. * Those beams will need to be replaced; it looks as though woodworm has set in. 那些大梁该换了, 看样子里面生了蛀虫了.

servility, serving, servitude, servo, servo-, servo-mechanism, servo-motor, servo-system, sesame, session, set, set a goal, set about, set apart, set aside, set back, set down, set fire to, set forth, set free, set light by, set off, set on sb, set oneself against, set oneself up as, set out, set out to, set piece, set sb against sb, set sb down, set sb up, set sb/sth apart (from sb/sth), set square, set sth aside, set sth back (sth), set the table, set theory, set to, set up, set-back,