Etendue
集光率
🗣️ 情景例句
That was very kind of you.
你真周到。
I got a bonus.
我得到了一份红利。
A game that is very popular with these young swimmers is the underwater tricycle race.
这些幼小的游泳运动员非常喜爱的一种游戏是水下三轮车比赛。