But despite his age Zhou still lives in a modest third-floor walk-up.

但是，虽然周的年事已高，他仍旧居住在一个简陋的三层高楼房里。

My family of six crammed into a small, two-bedroom apartment in a three-story walk-up in Brooklyn.

我们一家六口挤在布鲁克林的一间位于三楼的、无电梯且狭小的两居室公寓。