Monophyly
单系
🗣️ 情景例句
Can I use your car for a couple of hours?
我们能借你的车用几个小时吗？
Opportunity seldom knocks twice.
机不可失，失不再来。
As the floods had put the telephone out of order, we could not find out how they were managing.
由于洪水造成了电话中断，我们无法了解他们情况。