Some partially melt, and can release lubricating fluids made of superheated minerals that reduce fault line friction.

有些岩石会部分融化成超高温的矿物质，类似润滑液一样减少断层摩擦。

These membranes secrete a lubricating fluid, which allows for free movement of the lungs against the chest wall when we breathe.

这些膜分泌出润滑液，使我们呼吸时肺部相对于胸壁自由运动。

The pleural membranes secrete a lubricating fluid which allows them to move freely against each other during ventilation, like pistons within a cylinder of an engine.

胸膜分泌润滑剂使它们在通风系统里更好的运动，像引擎里的活塞和汽缸一样。

Some partially melt, and can release lubricating fluids made of superheated minerals that reduce fault line friction. But some are left dry, prone to dangerous build-ups of pressure.

可以释放由过热矿物制成的润滑液， 减少断层线摩擦。 但有些是干涸的， 容易产生危险的压力积聚。