External critics have frequently argued that this cannot be substantiated by firm evidence and say the world has already passed its peak in oil production.
外界批评人士经常辩论说，有确凿的证据显示，这一预测毫无依据，并且表示，世界石油产量早已跨过了高峰期。
It addresses the new regulations set out by the European food Safety Authority that any health claims made on a food label should be substantiated by scientific evidence.
遵循欧洲食品安全局订立的新规章：食品标签的任何健康声明都应用科学依据证实。
By 1997, however, its claims couldn't be substantiated, and one of the company's geologists died under mysterious (and ambiguous) circumstances.
但结果连一勺的金子都没找到。到1997年，Bre - X没能兑现承诺，公司的一位地质学家神秘死亡(有争议)。
A practical example showed that the efficiency of pumps with low specific-speed could be improved by using the calculation method presented, so that the design theory of such pumps was substantiated.
实例表明：提出的计算方法能够提高低比转速离心泵的效率，充实了低比转速离心泵的设计理论。
A practical example showed that the efficiency of pumps with low specific-speed could be improved by using the calculation method presented, so that the design theory of such pumps was substantiated.
实例表明：提出的计算方法能够提高低比转速离心泵的效率，充实了低比转速离心泵的设计理论。
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