You should always strive to achieve more, however well you have done before.
无论之前取得何等辉煌的成就，都应该不断努力进取。

并列句概念:

并列句（compound sentence），两个或两个以上的简单句用并列连词连在一起构成的句子，叫做并列句。

其基本结构是“简单句+并列连词+简单句”。

并列连词有：and，but，or，so等。

并列句中的各简单句意义同等重要，相互之间没有从属关系，是平行并列的关系。它们之间用连词连结。

however词义：

|haʊˈevə(r)|

不管用什么方式；无论如何 

You use however wh搜趣网en you want to say that it makes no difference how something is done.

however造句：

● HoweveJacCtner we adopt healthcare reform, it isn't going to save major amounts of money.

不管我们采取何种医疗改革措施，都省不下太多钱。

●www.souquanme.com Wear your hair however you want.  

你想弄什么发型自己看着办。