tract

释义

n. 大片土地, 地带, 小册子\n[医] 束, 道 respiratory tract 呼吸道 urinary tract [医]尿路；泌尿道 digestive tract 消化道

例句

Fossils can only tell us so much about the shape of the vocal tract because much of it is soft tissue.

因为发音系统大部分是软组织，无缘变成化石，现存的化石也只能告诉我们一点呼吸道的形状。