天气很冷，然而他还是决定穿短袖出门。

It was very cold; ___however, he decided to wear a short-sleeved shirt.

无论你如何处理这个问题，都要确保公平。

___However you decide to handle this issue, make sure it's done fairly.

无论她跑得多快，都赶不上火车了。

___However fast she ran, she couldn't catch the train.