
hand something↔in (to somebody): to give something to a person in authority, especially a piece of work or something that is lost 提交,呈交,上交(尤指書(shū)面材料或失物)
You must all hand in your projects by the end of next week. 你們都必須在下周末前交出研究報(bào)告.
I handed the watch in to the police. 我把那塊表交給了警察.
to hand in your notice/resignation(= formally tell your employer that you want to stop working for them) 遞交辭呈
counterproductive: having the opposite effect to the one which was intended 產(chǎn)生相反效果;事與愿違;適得其反
Increases in taxation would be counterproductive. 多征稅的效果會(huì)適得其反.