他们中很少人知道三明治的来历
Few of then know the history of the sandwich.
现在相当多的人可以活到八十多岁.
Nowadays a lot of people can live to be over 80 years old.
在课上,老师停下来要我们不要往窗外看.
In the class, our teacher stopped to ask us not to look out of the window.
人工翻译,祝学习进步!