Water vaporises when it boils.

水煮开时就变成蒸汽。

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This kettle whistles when it boils.

这水壶在水开时会哔哔作响。

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"My kids love when it boils and starts to whistle," she wrote.

“我的孩子喜欢它煮沸并发出响声的时候，”她写道。

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"My kids love when it boils and starts to whistle," she wrote.

“我的孩子喜欢它煮沸并发出响声的时候，”她写道。

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