婴儿很难调节自己的体温。

Babies find it difficult to ___regulate their body temperature.

我向司机表达了调节温度的愿望，但他对我以及其他乘客都非常粗鲁。

I expressed a wish to the driver to ___regulate the temperature, but he was extremely rude to me as well as to other passengers.

新系统自动调节水流以防止洪水。

The new system automatically ___regulates the flow of water to prevent flooding.