however
adv
conjunction
haʊˈevə adv
1 used when you are adding a fact or piece of information that seems surprising, or seems very different from what you have just said 然而，不过，但是;
This is a cheap and simple process. However there are dangers.
这是个花钱少而又简单的方法，不过有些危险。
an extremely unpleasant disease which is, however, easy to treat
一种让人很难受却容易治疗的病
2 used to say that it does not matter how big, good, serious etc something is because it will not change a situation in any way 无论多大 （好，严重等 ）;
You should report any incident, however minor it is.
任何事你都应该汇报，不管事情多么不起眼。
We have to finish, however long it takes.
无论要花多长时间，我们都得完成。
however much/many
I really want the car, however much it costs.
不管那辆汽车多贵，我真的很想要。
3 used to show surprise when you ask how something happens or how someone does something [尤英] （到底）如何？〔表示惊讶〕 especially BrE
However did he get that job?
他到底是怎样得到那份工作的？
conjunction
4 in whatever way 不管怎样，无论如何
You can do it however you like，
你可以按自己的意思去做。
If we win the match we’ll be delighted, however it happens，
如果我们能赢下这场比赛，不管怎么赢的我们都会高兴。
However you look at it, it was a wicked thing to do.
不管你怎么看待这件事情，它都是一件缺德的事。