Tail straight up and quivering: I am so happy to see you!
“尾巴直抖动起来：”我很高兴见到你！
If straight, the tail should be cylindrical and of uniform taper.
如果尾巴是直的，则呈圆住形。
With his mouth shut and his tail straight up and down we sail like brothers.
鱼闭着嘴，尾巴直上直下地竖着，我们像。
With his mouth shut and his tail straight up and down we sail like brothers.
鱼闭着嘴，尾巴直上直下地竖着，我们像。
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