Brown notes that he can't say whether the childhood stressors actually cause premature deaths, as causation is always difficult to establish with a single study.
布朗指出,他不能说儿童时期受到刺激就是导致早逝的真实原因,因为仅通过一项研究往往难以确定原因。
This paper analyzes causation of "uprightness maladjustment" in the single pipe, and puts forward corresponding prevention measure.
本文对单管顺流式“垂直失调”的原因进行分析,并提出相应的防治措施。
This paper analyzes causation of "uprightness maladjustment" in the single pipe, and puts forward corresponding prevention measure.
本文对单管顺流式“垂直失调”的原因进行分析,并提出相应的防治措施。
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