我们吃鱼、肉和豆类，因为它们中的营养物质对我们的肌肉有好处。

We eat fish, meat and beans because the nutrient in them is good for our muscles.

youdao

像所有的健身房一样，它们有各种各样的器材来帮助锻炼身体不同部位的肌肉，比如实用的自行车、胸部拉伸机和跑步机。

Like all gyms, they have all sorts of things to help build up muscles in different parts of the body, like applied bicycles, chest stretching machines, and running machines.

youdao

骡子和马一样有强壮的肌肉，但它们吃得更少，工作时间更长，而且像驴一样温和。

Mules have strong muscles like horses but they eat less, can work longer, and are gentler like donkeys.

youdao

As it does that it changes the volume of the heart and gives the - creates the pressure that moves blood around your body, so it has that muscular system.

这使心脏的体积发生变化,产生了足以使血液流遍全身的压力,这就是心脏中有肌肉系统的原因

耶鲁公开课 - 生物医学工程探索课程节选

you have the skate park, you have Muscle Beach, which are very, very exclusive.

有滑板公园，有肌肉海滩，这些都是这里所独有的。

关于肌肉海滩 - SpeakingMax英语口语达人

Your stomach is a very complex organ that has a muscle layer, it has an epithelial layer which is the interface with food that comes in, and it also has a nervous system, so does the heart.

你的胃是一个非常复杂的器官,它拥有一个肌肉层,有一个与摄入的食物,相接触的表皮层,也有一套神经系统,心脏也有

耶鲁公开课 - 生物医学工程探索课程节选