求翻译：但是一定要多穿点。因为长白上上很冷。你们得穿个长袖再加个外套。绝对不能穿短裤。凉鞋。可以带雨衣雨伞是什么意思？

But be sure to put on more. Changbai is cold. You have to wear a long sleeve plus a coat. Should definitely not wear shorts. Sandals. Can take a raincoat umbrella