英语语法分析

Our grandfathers ancestored some of the well-known families in Beijing.

我们的祖父辈是北京几家望族的祖先。

Both his grandfathers were miners who had to retire from work through injury.

他的祖父和外祖父都是矿工，他们因伤不得不从工作中退下来。

Our streets are actually not as safe as they were in the days of our grandfathers.

我们的街道不再像我们的祖父那个时代一样安全了。