vapor
US /ˈveɪ.pɚ/
UK /ˈveɪ.pɚ/

1.
2.
空谈, 虚无
a feeling or mood that is insubstantial or fleeting
:
•
His promises often turn out to be mere vapor.
他的承诺常常只是空谈。
•
The excitement of the moment quickly turned to vapor.
那一刻的兴奋很快化为乌有。
1.
汽化, 蒸发
to convert into vapor
:
•
The intense heat caused the liquid to vaporize rapidly.
强烈的热量导致液体迅速蒸发。
•
The scientist used a special device to vaporize the sample.
科学家使用特殊设备将样品汽化。