We are both single
单身───single;两个───Two
I got a single to Birmingham.───我买了一张去伯明翰的单程票.
When will the single currency be operable?───什么时候实行单一货币？
Is it difficult being a single mother?───做单身妈妈难吗？
They quoted 756 dollars for the single New York — London fare.───他们对纽约到伦敦的单程机票开价是756美元.
He sent her a single red rose.───他送给她一支红玫瑰。
She had a brainstorm in the exam and didn't answer a single question.───她考试时脑子里突然一片混乱，一个题也没答。
She had had many proposals but preferred to remain single.───许多人向她求过婚,但她愿过独身生活.
A single tree in a field is prominent.───田地里一棵孤零零的树是很显眼的.
A single fare is 170 dollars.
He sent her a single red rose.
He knocked his opponent down with a single blow.
Misfortunes never [seldom] come alone [single].
Many species have diverged from a single ancestor.