Helium is the by product of millennia of radioactive decay from the elements thorium and uranium.
氦是钍和铀元素数千年放射性衰变的副产品。
2
It's about 70 degrees, the sun is beating down, it smells like decay, and it's time for Coke to move some product.
现在大约70度，阳光烤晒着大地，好像要把一切都烤焦。现在是时候拿出可口可乐公司的产品了。
3
Where glulam beams will be exposed to weather, request a preservative-treated product or consider wood that has a natural resistance to decay, such as Alaska yellow cedar or Port Orford cedar.