Film analysis of the infant's responses, heart and respirationrate monitors, and nonnutritive sucking devices are used as effective tools in understanding infant perception.
婴儿反应的胶片分析、心率和呼吸速率监测器以及非营养性吸吮装置是理解婴儿感知的有效工具。
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In the case of severe heat stroke, heart rate and respiration rate will increase as blood pressure drops and the heart attempts to supply enough oxygen to the body.