工人们在炎热的夏天被困在这个没有通风的小屋里，简直就像个蒸笼。

The workers were stuck in that poorly ventilated shed in the hot summer, which felt like a ___sweatbox.

没有空调的公交车在夏天就像一个蒸笼。

The bus without air conditioning feels like a ___sweatbox in summer.

他在健身房的桑拿房里蒸了15分钟来放松肌肉。

He spent 15 minutes in the ___sauna at the gym to relax his muscles.