As for cartilaginous fish, Conseil went on unflappably, they consist of only three orders.

至于软骨鱼，康塞尔很冷静地又说，那就只有三目。

Their cartilaginous skeletons are less dense than bony ones and require less energy to move.

些生理特质从4亿多年中进化而来它们软骨质的骨架比硬骨的骨架更轻。

Yes, of course. So which type of joint can you crack? Is it … a) fibrous? b) cartilaginous? Or c) synovial?

当然。那么你掰响哪一关节？是a)纤维性关节? b)软骨性关节? c)滑液性关节?

Spoken like a true glutton, Conseil replied. But tell me, are you familiar with the differences between bony fish and cartilaginous fish?

是讲究吃喝的人的一法，康塞尔回答，请您告诉我，您知道硬骨鱼和软骨鱼之间存在的差别吗?

Several of these classes are specific types of fish, for example: jawless fish, like lampreys and hagfish, and cartilaginous fish, like sharks and rays.

些纲的一些便是鱼，比如：无颚纲鱼形动物，像七鳃鳗、盲鳗和软骨纲鱼，像鲨鱼和魔鬼鱼。

OK, if you say so, Professor. And since you're in a scientific mood, how about answering today's quiz question. Which type of joint can you crack? Is it … a) fibrous? b) cartilaginous? Or c) synovial?

好吧，随你怎么说吧，大教授。既然你想谈论科学，那么就来回答一下今天的测试题吧。人体的哪一个关节可以被掰响？是a)纤维性关节? b)软骨性关节? c)滑液性关节?