在这一层次交流意味着，我们将自己最脆弱的部分呈现给他人。
Communicating at this level means we offer someone the most vulnerable part of ourselves.
但最近对泰坦内部的一项新研究却揭开了这颗奇异星球更为怪诞的一面：脆弱的甲烷冰地表之下，覆盖着一层冰泥，更深处依然是一个地下海洋，最中间是冰和岩石并存的固态核心。
But a new look at Titan's insides reveals even more oddities: Beneath the brittle crust of ice lies a layer of slush. Deeper still is an underground ocean over a solid core of rock and ice.
与逻辑层系统的灵活性相比，物理层的面向对象的系统显得有些脆弱。
When compared to the flexibility of a logical system, physical level object-oriented systems appear brittle.
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