🗣️ 情景例句
The whole family decided to spend their holiday in Hawaii.
全家决定到夏威夷度假。
Don't forget to put stamps on the letter before you mail it.
不要忘记在寄信以前把邮票贴在信封上。
What will be the population of these countries by the end of the twentieth century?
到20世界末较发达国家的人口将是多少？