? 同義詞
??? 情景例句
He keeps himself fit by running 5 miles every day.
他每天跑五公里以保持身體健康。
What do economists say about the present crisis?
經(jīng)濟(jì)學(xué)家們對于現(xiàn)在的危機(jī)做何說法？
Why? English is the first language in none of these countries.
為什么？在這些國家中英語都不是第一語言。