蔡国庆曾经是一位嗓音柔和，笑容明朗的温柔歌者，而现在他已经完全颠覆了以往的形象。

Once a mild-manner singer with a soft singing voice and a bright smile, Cai has got rid of his old image.

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现在研究已经使这个问题大为明朗化了。

Modern researches have shed great light on his question.

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现在研究已经使这个问题大为明朗化了。

Modern researches have shed great light on his question.

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