Box spring
01
弹簧床座, 箱式弹簧
a type of bed foundation that sits underneath a mattress to provide support, absorb shock, and extend the life of the mattress
例子
The mattress feels much more comfortable with the box spring beneath it.
床垫下面有弹簧床架感觉更舒服。
She noticed that the box spring was starting to sag, so she decided to replace it.
她注意到床垫弹簧开始下垂，于是决定更换它。
