在这些情况下氮不会是可用的对于同其他元素结合，为了形成化合物和形成生命的建筑模块的链条。
Under these conditions the nitrogen would not be available to bond with other elements in order to form the compounds and chains that form the building blocks of life.
这些造影剂 是包括靶向模块和可检测单元的化合物，所述靶向模块能够与前列腺癌 特异性分子标记物发生相互作用。
These contrast agents are compounds comprising a targeting module that is capable of interacting with a prostate cancer- specific molecular marker and a detectable unit.
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