Power density

power ['paʊɚ]

n. [机]动力，功率;力量;政权，权力;强国，大国; vt. 运转;用发动机发动;使…有力量; vi. 靠动力行进;快速行进; adj. 权力的;机械能的，电动的;用电力（或动力）发动的;

density ['dɛnsəti]

n. 密度;稠密，浓厚;[物]浓度，比重;愚钝;

dens变浓厚+ity表名词 → 比重；浓缩

Wrap him in the blanket, Dad!

用毯子把他裹好， 爸爸！

Lie in (oron) the bed one has made.

自作自受。

The only way that they can preserve their history is to recount it as sagas -- legends handed down from one generation of another.These legends are useful because they can tell us something about migrations of people who lived long ago, but none could wri

他们保存历史的唯一办法是将历史当作传说讲述，由讲述人一代接一代地将史实描述为传奇故事口传下来。