但是“dolphin”有长圆形的鼻子和锥形的牙齿，而“porpoise”的鼻子却是扁平形，牙齿是凿形的。

But the dolphin has a bottle-shaped nose and cone-shaped teeth while the porpoise has a flat nose and chisel-shaped teeth.

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玉琮的抛光工艺上，磨垅光洁而不留据、钻、凿、磋的痕迹，使得器形浑圆规整。

Tsung-yu of the polishing process, the mill rather than to stay bright and clean, according to Long, drilling, cutting, traces of polish, making regular rounded shape.

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