Ballvalve
球型人造瓣膜
🗣️ 情景例句
Where's the ticket counter?
售票处在哪儿？
I am sorry that we are unable to make you an offer for the time being.
很抱歉目前我们不能报盘。
sometimes with the local priest (who was usually as poor as his parishioners), sometimes with shepherds or cheese-makers.
有时同当地牧师 （他通常和他的教民一样穷）住在一起，有时同牧羊人或制乳酪的人住在一起。