??? 情景例句
I have no time for extra-curricular activities.
我可沒時(shí)間參加課外活動(dòng)。
Please speak slowly, so I can understand you.
請慢慢地說，那樣我就能聽得懂你說的話了。
What was the population of the more developed countries in 1950?
1950年較發(fā)達(dá)國家的人口是多少？