I have spent a considerable portion of my life here.

我已在这里度过了一生中的大部分时光。

《柯林斯英汉双解大词典》

So I don't think it's at all strange that people like a rising market, whether or not they're in the saving portion of their life.

所以不管他们是不是在为他们的生活做储蓄（买股票），我完全不认为人们喜欢股市上涨有什么奇怪。

youdao

When you give someone your time, you are giving them a portion of your life that you'll never get back. Your time is your life.

因此当你付出时间给某人，乃是将你生命的一部分送给他，而那是绝对要不回来的，因为时间就是生命。

youdao

This political life came to be shared by a relatively large portion of the people and participation of political life was highly valued by the Greeks.

政治生活自诞生起,就被绝大多数的民众所分享,希腊人高度重视,政治生活的参与度

耶鲁公开课 - 古希腊历史简介课程节选

My daughter is going to spend a good portion of her life at work.

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Someone who has spent a good portion of her life gaining purchase has suddenly been asked to sell something, and she seems to find it slightly beneath her.

NEWYORKER: The Other Obama

Work occupies a large portion of her life.

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