完成做某事用英语怎么表达

例句：

如果我不知道如何完成某事，那就索性不要开始做这件事？

I cannot start something if I do not know exactly how to finish it.

但是在数字世界里，对象之所以可以完成任务，是因为程序员赋予它做某事的'能力。

However,in the digital world,an object does what it can do because a programmer imbued it with the power to do something.

当你全身心投入的做某事，并且把它完成，这种令人回味的满足感就是幸福，是你所有努力和辛勤付出换来的兴奋感。

When you pour your heart and soul into something and you accomplish that something,the afterglow of satisfaction you feel is happiness. It is the thrill of all your efforts and hard work.