洛克·史密斯先生脱去帽子和手套，安然地在桌边坐下，把拆开的文件理成整齐的一叠，依次一一过目。
Relinquishing his hat and gloves, Mr. Rokesmith sat down quietly at the table, arranged the open papers into an orderly heap, cast his eyes over each in succession.
三叠纪是中生代中最老的一一个纪，然后依次为侏罗纪和白垩纪。
Triassic is the oldest period of Mesozoic followed successively by Jurassic and Cretaceous Periods.
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