他用许多0和1来表示最早期时生命的化学成分(很可能是由腺嘌呤、胸腺嘧啶、鸟嘌呤、胞嘧啶和尿嘧啶组成的化合物)。
He USES zeroes and ones to represent the very first chemical building blocks of life (most likely compounds based on adenine, thymine, guanine, cytosine or uracil).
X射线就像探针一样，可以检测到组成化石的单一化学成分。
The X-rays acted as probes, detecting the individual chemical building blocks that make up the fossil.
从化学成分、理化性质及矿物组成方面，对粉煤灰应用于铸造涂料的可行性进行分析。
The feasibility of applying the fly ash to mold coating is analyzed from aspects of chemical composition, physicochemical properties and mineral component.
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