同位素标记物质 isotopically labeled material
致癌物质标记物 marker carcinogen ; marker of carcinogen
标记着瘦体重物质 lean muscle mass
特征次生物质标记法 The special secondary metabolite marking method
特征性次生物质标记法 Specific secondary metabolite marker
幸运的是，当我们要拍和一个虚拟角色的戏时，剧组通常会在我们面前放一个标记物质，这样我们就不是完全的对着空气表演。
Fortunately, when we film a scene with a virtual character, the team always puts a guide mark in front of us. Thus we're not playing completely in the emptiness.
高能电子和正电子从一个内部的X射线环中向外运动，在不同形式的物质中标记出了一个冲击波，产生了一个膨胀的X射线光。
Energetic electrons and positrons (antielectrons) move out from an inner X-ray ring, which marks a shockwave between different forms of matter, to produce an extended X-ray glow.
因此在新的研究中，为避免再出现这种错误，他们将每一条尼安德特人的DNA都标记出来，以区别于所有外来的遗传物质。
To avoid such errors in the new study, they tagged each Neanderthal DNA strand with a unique molecular bar-code, to distinguish it biochemically from any extraneous genetic material.
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