spend time on sth 不必非得加 on/in doing sth

spend time on sth 不必非得加 on/in doing sth spend ...on(in) doing sth ---------------------------------- spend time （on） doing sth 和spend time （in） doing sth spend time in doing sth和spend time on doing sth的区别 spend time on sth 和spend time in doing sth 用法和区别 spend on sth 等于spend doing sth spend doing sth和spend on sth spend...on(in)doing sth.造句 sb spend time/money on sth/in doing sth 造句2个 英译汉.①sb spend $/time on sth ②sb spend $/time in doing spend的用法spend 一般不就用在spend on sth 和spend (in) doing sth spend 有spend.on doing sth