英语翻译.了解一个国家的一种办法是收集这个国家的邮票(learn about)2.全班学生被分成几组来讨论这个题目的不同

这个会议是纪念爆炸中的死难者所举行的
This meeting is hold in honor of those dead in the explosion
了解一个国家的一种办法是收集这个国家的邮票
One way to learn about a country is to collect its stamps
全班学生被分成几组来讨论这个题目的不同部分应该是talk about吧~
The whole class is divided into several groups to talk about different parts of this problem
我想知道有多少个国家参加了上届奥运会
I want to know how many countries has taken part in the last Olympic Games
如果人人都做一点贡献来保护环境的话,世界将会变的更美丽
If everyone make a little contributions to protect the environment, this word will become much more beautiful.
有不会的可以再问我