"Their teacher is a woman" 这句话用英语可以说成 "Their teacher is female" 。
"Female" 是形容词，来源于拉丁语"feminus"，意思是女性的。
例句:
Their teacher is female. 他们的老师是女性。
She is one of the few female engineers in the company. 她是公司里少数几位女性工程师之一。
The female pon is responsible for hunting for the pride. 母狮子负责猎物。