初中英语牛津（试用本）八年级下 词汇 Unit 2
例句：These workers are paid on a daily basis.
例句：The amount of unemployed capital is very large.
3. increase v.（使）增加
例句：The workers are trying their best to increase productivity.
例句：I remain in London until May.
例句：We use x as the symbol for an unknown quantity.
例句：Offers of help flowed into the office.
例句：There is a ring of scum in the washbasin.
例句：He seemed to vanish into thin air.
例句：The drains overflowed after the heavy rain.
例句：He's impatient to know what happened.
例句：A soldier must obey his superior officers.
例句：A young student fainted in the hot sun.
例句：The logs floated down the river.
例句：Are you sitting comfortably?
例句：The music will help to relax you.
16.clean up 净化
例句：Who will clean up the cat's mess in the bedroom?