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来源:雅诚德英语网
Increases in nonnutritive sucking were first used as an assessment measure by researchers in 1969.
1969年,研究者们首次将无营养吮吸次数的增加作为评估标准。
Increases in nonnutritive sucking were first used as an assessment measure by researchers in 1969.
1969年,研究者们首次将无营养吮吸次数的增加作为评估标准。