除此之外，他们还会喂以人工合成色以素赋予鲑鱼粉红的肉色。
They have to be fed a synthetic pigment to give them their pink color.
我们现在通过测量掩埋在漂流物中木头放射性的碳-14元素，以精确地确定冰川作用的时期。
We now know the age of the glaciation accurately from radiometric dating of the carbon-14 in logs buried in the drift.
在水中大多数氢原子和氧原子是稳定的，但这两个元素也有微量以较重的同位素形式存在。
Most hydrogen and oxygen atoms in water are stable, but traces of both elements are also present as heavier isotopes.
应用推荐