英语语法分析

These movements can promote the eustachian tube merge, adjusts the internal ear pressure, reduces or prevents the earache.

这些动作可以促进咽鼓管合并，调节内耳压力，减轻或防止耳痛。

The child has earache caused by blocked Eustachian tubes.

这孩子因耳咽管堵塞而引起耳痛。

Normally the Eustachian tube is closed, so in order to equalize the pressure we need to open it.

通常情况下耳咽管都是关闭的，但当我们需要平衡气压时我们需要打开它。