With difficulty he released the mattress from the metal frame, and groped beneath it.

他费了很大劲把床垫从金属架上卸下来，然后在下面摸索一番。

《柯林斯英汉双解大词典》

If not, you can buy a lofting structure that supports your bed on a metal frame. You can tuck your dresser or desk under your lofted bed to free up some floor space.

如果没有的话，你可以买一个金属制造的阁楼床架，以便将你的衣柜和书桌放在床下节省地面空间。

youdao

Rust has eaten away at the metal frame.

这个金属框已被慢慢腐蚀了。

youdao

A hoop house is basically a metal frame covered with plastic or other all-weather material.

VOA: special.2009.12.22

By 7 a.m. all that remained of the building was a metal frame and some charred cinder blocks.

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The metal frame of their storm-chasing vehicle was twisted almost beyond recognition.

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"You're talking about panels that sit on a metal frame, " he added.

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