直到18世纪，人们还依赖于来自植物、动物和人类肌肉的能量来为自身提供动力。

Until the eighteenth century, people relied on energy derived from plants as well as animal and human muscle to provide power.

youdao

这个事件会将地球和人类的水晶能量重新编码。

This event will recode the crystalline energy of both the planet and humanity.

youdao

恒温动物，如人类和犬只，通过消耗大部分的能量产生热量来保持身体的温暖。

Warm-blooded animals, like humans and dogs, spend much of their energy generating heat to keep the body warm.

youdao

Again, notice how bodily, how material and physical Yeats's images of human energy are.

注意叶芝诗里人类能量,多和肉体物质相关的。

耶鲁公开课 - 现代诗歌课程节选