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。
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.
凡集成胶合木梁材将要暴露在室外天气下，要求产品用防腐剂进行处理，或考虑运用具有天然抗腐烂的木材，如阿拉斯加黄杉木或港口奥福德杉树。
It occurs in Uranium ores as a by product of nuclear decay.
它作为一种原子核衰变的副产物，产生在铀矿石里。
In addition, the decay from WIMP to super-WIMP should have produced photons or electrons as a by-product, and these particles can smash into light nuclei and break them apart.
而且，在弱相互作用重粒子衰变成超级弱相互作用重粒子过程中，应该产生光子和电子等副产品，并且这些粒子也会与质量较轻的原子核发生碰撞，将它们撞碎。
The decay rate of M-product was stable with low humidity and was accelerated rapidly with humidity higher than 70%.
在相对湿度小于70%时，M衰减速率相对稳定，不随湿度改变而变化； 但当湿度大于70%时，则衰减速率急剧上升。
The decay rate of M-product was stable with low humidity and was accelerated rapidly with humidity higher than 70%.
在相对湿度小于70%时，M衰减速率相对稳定，不随湿度改变而变化； 但当湿度大于70%时，则衰减速率急剧上升。
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