They are soft and smooth-skinned, with a circular or nearly circular Body disk formed by the head and pectoral fins. They are harmless unless touched or stepped on.

体柔软，皮肤光滑，头与胸鳍形成圆或近于圆形的体盘。如不被触及则对人无害。

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Marine fishes with a flattened elongated body and a sucking disk on the head for attaching to large fish or moving objects.

身体扁平细长的海生鱼，头部有吸盘，可吸附于大鱼或移动的物体上。

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In this paper, a computational method for coplanar disk-shaped cracks within an elastic infinite body is presented.

本文对于含有圆盘状共面裂纹群的无限体提出了一种计算方法。

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By adopting a sliding disk cover, the new PS3 continues with the characteristic sleek curved body design, which fits various places in the home and enables users to enjoy an array of entertainment content.

ENGADGET: Sony announces a slimmer PlayStation 3, 250GB bundle launches September 25th for $269