Some people become cardiologists and care for the heart.

一些人成为心血管专家护理心脏。

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But some cardiologists think there is still plenty of room for improvement.

但还有心脏专家认为这一技术还有可以改进的空间。

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But some cardiologists think there is still plenty of room for improvement.

但还有心脏专家认为这一技术还有可以改进的空间。

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