本文是关于HSK外部效度的一次实证性研究。
This paper is an experimental study on the external validity of HSK.
控制具体测量过程中的无关变量的影响，保证统计处理的外部效度。
The researchers also should reduce the influence of irrelevant variables in measurement to guarantee the external validity of processing.
由于本研究的外部效度仍待验证，因此对本研究结论的外推应尤其谨慎。
With an unproven external validity, the author suggests a cautious application of this research when translated to the general field of college-choice behavior.
单一被试实验是特殊儿童心理与教育研究中的一种常用方法，但其外部效度往往受到质疑。
The single subject research is one of the useful methods in the research of special children's psychology and education, but its external validity often receives challenges.
采用复合铸造法研制了一种芯部为低碳钢、外部为高铬铸钢的高耐磨碾齿，此碾齿用于玻璃厂破碎物料的粉碎机上，取得了良好的效。
By adopting a compound casting method, we have developed a kind of high wear resisting crushing bar, with low carbon steel interior, high chromium casting steel exterior.
如此，藉由覆层补强金属的增设，可有效增加结构强度，对抗外部应力防止断裂。
Therefore, by means of the additional arrangement of the coated reinforced metal, the strength of the structure can be effectively improved to resist external stress and prevent cracking.
如此，藉由覆层补强金属的增设，可有效增加结构强度，对抗外部应力防止断裂。
Therefore, by means of the additional arrangement of the coated reinforced metal, the strength of the structure can be effectively improved to resist external stress and prevent cracking.
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