Don't show this restricted material to others.
不要把这些内部参考资料给别人看。
This method is restricted because of representation and localization of the core material.
鉴于取心资料的代表性及局限性，也指出了此方法的局限性。
This method is restricted because of representation and localization of the core material.
鉴于取心资料的代表性及局限性，也指出了此方法的局限性。
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