The main reasons include infants' disease, feeding times, sorts of food and feeding behavior.
患病、喂养次数、食物结构、喂养行为等影响婴幼儿的热能摄入量。
The main reasons include the settings of their learning, their motivations and the level of their learning in Chinese.
指出这些不同点存在的主要原因在于学习环境的不同、学习动机的不同以及目标语水平的不同。
Other possible reasons include problems with the oil pump, rod and main bearing clearances, camshaft stopping playing, or cam bearings and lifters.
其他可能的原因包括油泵问题、杆和主轴承的空隙、凸轮轴停止工作、或者凸轮的方位和升降。
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