Monotube
单管的, 直流的
🗣️ 情景例句
And it turns out he's a classmate of Philip's.
有意思的是 他和Philip是同班同学。
Never swap (or swop) horses while crossing the stream.
骑渡中流莫换马。（指危难时不宜做大变动）
My friend, you shouldn't judge strangers always by the clothes they wear.
朋友，对于陌生人，你不应该老是凭人家的衣着来判断人。