请帮忙分析这个句子!It is held there by the force of surface tension w

请帮忙分析这个句子!
It is held there by the force of surface tension without which water would drain instantly from any wet surface,leaving it total ly dry
请教这个句子的结构,顺带翻译,最好能详细讲解一下without which 这两个词在句中的作用与成分,

它被表面张力所支撑着,而水从任何湿润的表面耗干一直到完全干燥,是不需要表面张力的.
It is held there by the force of surface tension 主句
without which water would drain instantly from any wet surface 定语从句
先行词是 the force of surface tension ,准确来说是 the force

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