wear a singlet 穿背心
cotton singlet 棉质汗衫
wrestling singlet 摔跤连体服
singlet state 单线态
A: Is it too hot to wear a jacket today?
A：今天穿夹克会太热吗？
B: No, just wear a singlet underneath if you need more comfort.
B：不会，如果需要更舒服点，里面穿件背心就行了。
1) 汗衫、背心 (British English)
2) 摔跤服 (one-piece garment)
3) (物理学) 单线态
1. 背心；汗衫
2. (物理) 单线态
noun
1. a sleeveless undershirt, especially in British English
2. a one-piece garment worn by wrestlers
3. a quantum state with a total spin of zero
Synonym: undershirt, tank top