occipital furrow

例句：

1. 1. The occipital furrow is a natural feature of the skull that helps support the brain.
   枕骨沟是颅骨的一个自然特征，有助于支撑大脑。
2. 2. During sleep, the occipital furrow deepens, allowing for better blood flow to the brain.
   睡眠时，枕骨沟变深，有助于更好的血液流向大脑。
3. 3. A cerebral hemorrhage can occur when the occipital furrow becomes too narrow, causing bleeding in the brain tissue.
   当枕骨沟变得太窄时，可能发生脑内出血，导致脑部组织出血。