The inner lip and the outerlip respectively prevent oil from spilling, and prevent impurities from entering on different positions, and simultaneously play dual protection to the universal joint.
两者在不同 位置分别防油溢出、防杂质进入，同时对万向节起到了双重保护。
2
The researchers foundthat as long as the grounding line is on the outer rise of the sea bed, before the lip, small changes in climate lead to correspondingly smallchanges in the glacier's ice volume.