The thing that we are concerned about is that the dew points are going to be a little higher...我们担心的是露点会有所升高

concern about关心…

She was concerned about the stratification of American society.

她很关注美国社会的阶层分化。

Investors weren't concerned about short-term profits over the next few years.

投资者对未来几年里的短期收益并不感兴趣。

Two record-breaking years back-to-back is unheard of in this part of the world.连续两年出现极端天气在这片土地上还是头一遭

back-to-back连续的，一个接一个的

Stand back to back and we'll see which of you is taller.

背靠背地站着,我们好看一看你们哪一个较高.

He scored two home runs back to back in the 9 th inning.

他在第9局连续获2分.

unheard of 没发生过的；令人震惊的；前所未有的

He'd dyed his hair, which was almost unheard-of in the 1960s.

他染了头发，这在20世纪60年代是罕见的事。

We are developing our production at a speed unheard - of before.

我们正以前所未闻的速度发展生产.