vapor|vapour

当水加热时，会产生蒸汽。

When water is heated, it produces ___vapour.

当水被加热时，会变成蒸汽。

When water is heated, it turns into ___vapor.

热水杯上方升起的水蒸气在寒冷的空气中清晰可见。

The ___vapour rising from the hot cup was clearly visible in the cold air.

听闻噩耗后，他晕厥过去，随后整日闭门不出。

Upon hearing the tragic news, he fell into a ___vapour and later shut himself indoors.

当水沸腾时，会产生大量水蒸气。

When water boils, it produces a lot of ___vapor.

热水壶冒出的蒸汽在寒冷的空气中形成了一片白色的雾气。

The hot kettle released a cloud of white ___vapor into the cold air.