Life has become a burden to him.

生活对他来说已经成了负担。

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Parents' love of children has become a burden.

父母的爱已经成为孩子们的负担。

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However, the eXPectation of perfection has become a burden to her.

然而，对完美的期望却变成了她的负担。

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But it has become a burden for the good guys.

FORBES: Magazine Article

Debt in these countries has become a burden not because of government profligacy but because each enjoyed a decade of low interest rates and was then hit by the financial crisis.

ECONOMIST: The causes

However, the dramatic decrease of demand in the last few years has become far too great a burden to be covered by corporate efforts.

ENGADGET: Fujifilm sees which way wind is blowing, ends production of cinema film