Dalembertian
达兰伯算符
🗣️ 情景例句
I've been wrestling
我一直左思右想
I would like to confirm the reserved seat.
我要确定已预定的位置。
He picked up what seemed to be the smallest bottle and discreetly asked the price.
他挑出一个看上去最小的瓶子，谨慎地问了价。