Heister's valve
[醫] 海斯特氏瓣(膽囊頸螺旋瓣)
?? 詞語組成解析
valve
[v?lv]
n. 閥;真空管;（管樂器的）活栓;（心臟的）瓣膜;
vt. 裝閥于;以活門調節;
??? 情景例句
It is OK to ask children how old they are.
問小孩多大了是可以的。
A wise man thinks all that he says,a fool says all that he thinks.
聰明人想了才說，愚笨的人想著就說。
and we know something of the great variety of the sea bed's topography.
而且我們對海底地形的千變萬化也有了一定的了解。