however hard the road infront is, you can't give up easily .
you cannot give up easily, however the road may be rough in the future
However hard the front road is,you shouldn't give up easily.
No matter how hard the way ahead is,you can't give it up easily.
还是要用no matter句型比较好表达：
No matter how hard it is for you to go ahead,you can not give up lightly!
however hard the road infront is ,you should never give up easily
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