Central canal
[医] 中央管
🧩 词语组成解析
🗣️ 情景例句
Could you please say it again?
你能重复一下吗？
Cheerfulness and goodwill make labour light.
欢快与好意，劳动不觉累。
There were twenty cars in the race.
参加比赛的有20辆汽车。