canalis

例句：

1. 1. The canal runs through the city and connects several villages.
   这条运河穿过城市，连接了几个村庄。
2. 2. The doctor inserted a cannula into her vein to administer medicine.
   医生将一根针插入她的静脉中给药。
3. 3.The scientist used a canalis to collect samples from the ocean floor.
   科学家使用一个导管从海底收集样本。