n. 大片土地;(神经纤维的)束;小册子;〈古〉一段时间,长时间
网络 传单; 广阔的地面; 道
Foods are broken down in the digestive tract.
食物在消化道内被分解。
A vast tract of land is ready for development.
一大片土地正待开发。
She produced a feminist tract, "Comments on Birth-Control," in 1930.
她1930年写了一篇女性主义短文《论计划生育》。
In humans, coronaviruses cause respiratory tract infections.
冠状病毒在人体内会引起呼吸道感染疾病。
That´s how it makes a difference to your digestive tract.
这就是它对消化道的影响。