Etendue
集光率
🗣️ 情景例句
I never really thought about being a mother as a career.
我真的从来没有想到做母亲还是一种事业。
How far is it to the university?
它离大学多远？
We are now living in a beautiful new house in the country.
我们现在住在乡间的一栋漂亮的新住宅里。