since/sɪns/

1.adverb

(from then onwards) 此后

They went to college together and have done business together since.
他们一起上的大学并从此后一起做生意。
2.adverb

(latterly) 后来

6,000 people were arrested, several hundred of whom have since been released.
6000人被逮捕,其中几百人后来被释放。
3.preposition

(from) 自…以来

I've been here since the end of June.
我自6月底以来一直在这儿。
4.preposition

(after) 从…以后

I haven't seen powdered eggs since the war.
自战后我从未见过鸡蛋粉。
5.conjunction

(from when) 自从

I've been wearing glasses since I was three.
我从3岁起就戴眼镜。
6.conjunction

(after) 从…以后

So much has changed in the sport since I was a teenager.
自我十几岁起,这项运动已经改变了很多。
7.conjunction

(as) 因为

Since it was Saturday, he stayed in bed an extra hour.
因为是星期六,他在床上多呆了一小时。
since then {or} ever since
从那时起
long since
很久以前