they're
US
UK they're contraction: informal, abbreviation (more than one person: they are)
SC 他们是
Be careful with the cookies, they're still very hot! I saw Rachel with her twins yesterday; they're 15 years old now.
they're contraction: informal, abbreviation (people in general: they are)
SC 他们是
they're contraction: informal, abbreviation ([sb] unspecified: they are)
SC 他们是
they're contraction: informal, abbreviation (non-binary person: they are)
SC 他们是