Nowadays, energy drinks get their energy from some kind of neurological stimulant, but back in the 1920s, they used real, radioactive energy from the element radium.

如今， 能量饮料从某种神经兴奋剂中获取能量，但早在 20 年代，他们使用的是来自镭元素的真实放射性能量。

Basically, scientists can shine a light on quartz grains in rocks to release radioactive energy they've picked up from the environment over centuries, and measuring that energy can tell how old the rock artifacts are.

基本上，科学家们可以用光照在岩石中的石英颗粒上， 以释放它们几个世纪以来从环境中获取的放射性能量， 测量这种能量可以判断出岩石文物的年龄。