求一句英文翻译：（这个交通标志,假如除去上面的"CONA"字母,我知道他的意思是限制速度在40KM/H以下...）

This traffic signal, if except above " CONA" The letter, Iknew his meaning is limits the speed below 40KM/H, that present has" CONA" The letter, what meaning is this sign?

For this traffic signal, I know that means the speed is limited below 40KM/H when there is no abbreviation "CONA" on it. What does it mean if there is "CONA" on it?

If the letters "CONA" were deleted from the traffic signal , the meaning of it could be known as 40km per hour in speed limination.However what does it mean by adding "CONA" now ?

前句可用虚拟语气。

Traffic signs, if removed above "CONA" letters, I know that he means the speed limit is 40 KM / H following

google 语言条 方便又好用

the traffic sign ,when regardless of the "CONA" means the speed limit of 40Km/h,Howerer what if with the words"CONA"?