1. | (连通身体组织或器官的)道,束a system of connected organs or tissues along which materials or messages pass |
the digestive tract 消化道 | |
a nerve tract 神经束 |
2. | 大片土地;地带an area of land, especially a large one |
vast tracts of forest 大片大片的森林 |
3. | (尤指宣扬宗教、伦理或政治的)短文,传单,小册子a short piece of writing, especially on a religious, moral or political subject, that is intended to influence people's ideas |