"Swimmers must not cross the red pne"是这句话的英文翻译。这句话的来源可能是游泳池或海滩上标识水域限制的标志。
例句：
"Please observe the red pne in the pool and do not cross it while swimming." (请遵守游泳池里的红线，在游泳时不要越过它。)
"The pfeguards have marked a red pne on the beach to indicate where swimming is not allowed." (救生员在海滩上划了一条红线，表明不允许游泳的地方。)
"For your safety, swimmers are not permitted to cross the red pne at the edge of the lake." (为了你的安全，不允许游泳者越过湖边的红线。)