求翻译 air current blow drops of water in a cloud up higher into cloud

气流将低云层中的水滴吹向高云层.cloud up higher into the cloud什么意思前面一个cloud是前面，这里要断句drops of water in a cloud 云层里的水滴是一起的up higher into cloud升到云层因为有up higher，所以我前面添了低云层，后面加了高云层，否则理解会有些问题