The thing that we are concerned about is that the dew points are going to be a little higher...我們擔心的是露點會有所升高

concern about關心…

She was concerned about the stratification of American society.

她很關注美國社會的階層分化。

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

投資者對未來幾年里的短期收益并不感興趣。

Two record-breaking years back-to-back is unheard of in this part of the world.連續兩年出現極端天氣在這片土地上還是頭一遭

back-to-back連續的，一個接一個的

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

背靠背地站著,我們好看一看你們哪一個較高.

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

他在第9局連續獲2分.

unheard of 沒發生過的；令人震驚的；前所未有的

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

他染了頭發，這在20世紀60年代是罕見的事。

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

我們正以前所未聞的速度發展生產.