however 
英 [haʊˈɛvə]  美 [haʊˈɛvər] 
conj. 然而，可是，不过

adv. 无论如何，不管怎样；究竟怎样，到底如何

例句：
I hoped he might offer me a job. However, he didn't. 

我还盼着他能给我提供一份工作，但是，他没有。

This, however, isn't true. 

然而，这不是真的。

Higher sales have not helped profits, however. 

然而，高销售量并没有带来更多的利润。

Some of the food crops failed. However, the cotton did quite well. 

一些粮食作物枯萎了，可棉花却长势良好。