He developed a serious illness and became blind.

他得了一种严重的疾病，双目失明。

youdao

At the same time, he became more truly serious, more truly grave, more sure of his thought and his faith.

同时他真的变得更加严肃了，真的更加深沉了，对自己的信念和思想也更加有把握了。

youdao

Although he seemed annoyed by this question, he assured me there was no one else, and that's when our relationship became more serious.

对这个问题他似乎很反感，他向我保证我是他的唯一，从那时起，我们开始更认真地对待我们的关系。

youdao

Heller's surfing adventure took him to the other side of the Pacific Ocean, where he became more aware of some serious environmental issues threatening the world's oceans.

VOA: standard.2010.08.04

But when he was 14 his father died and he became serious about his studies.

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He founded his political party in 1996 but it wasn't until late 2011 that he became a serious contender.

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He was clearly in distress and it quickly became clear he had sustained a serious injury.

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