虽然 (suī rán): 〜だけれども; 〜にもかかわらず（しばしば可是[ke3 shi4]や但是[dan4 shi4]などと呼応して用いられる）; 〜だけれども; 〜にもかかわらず（しばしば可是や但是と呼応して用いられる）

Although it was very cold today, I still went for a walk in the park.

Although Chinese is difficult, the more I study it, the more interested I become.

Although he is very busy, he calls his parents every day.

Although this problem looks simple, it is not easy to do.

Although we didn't know each other before, we have now become good friends.

Although the weather is very cold, we still decided to go to the park.

Although he lacks experience, he works very hard.

Although this piece of clothing is very expensive, I really like it.

Although Xiaoming was sick, he still came to class.