问题在于这种溶解足够快而造成深层渗透，并形成了长距离洞穴系统。
The question is how that dissolution can happen fast enough to produce deep penetration and allow long cave systems to form.
黄金不常用在皮肤的疗程中因为它非常难溶解并渗透于我们的皮肤。
Gold is not commonly used for skin treatments because it is very difficult to dissolve and penetrate the skin.
对高分子聚合膜渗透分离油中溶解气体的基本原理进行了深入分析。
Resolve inside to the high polymers membrane permeation separation oil the basic principle of the gas proceeded the thorough analysis.
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