tract

束；大片土地，地带；小册子英释中释na large area of land

1 respiratory tract,呼吸道

2 urinary tract,[医]尿路；泌尿道

3 digestive tract,消化道

4 gastrointestinal tract,胃肠道；胃肠管

5 upper respiratory tract,上呼吸道

6 urinary tract infection,尿路感染；尿道发炎

7 biliary tract,[医]胆道

8 intestinal tract,[医]肠道

9 alimentary tract,消化道

10 upper respiratory tract infection,上呼吸道感染

11 reproductive tract,[医]生殖系统；[生]生殖系

12 genital tract,生殖道；产道

13 vocal tract,声道

14 corticospinal tract,[医]皮质脊髓束；皮层脊髓束

1 vast tracts of woodland.大片大片的林地