Ventil
n. 活瓣
🗣️ 情景例句
He never speaks unless he is spoken to.
除非别人先对他开口，他从不先开口。
When three know it, all know it.
三人知，天下晓。
but as a special favour, he would let me have it for $30.
作为特别优惠，他愿意让我出30英镑成交。