To control the size of what you eat not only requires good self-discipline skills, but also proper estimate of the portion of different types of food to ensure balance and optimal nutrition.
节制饮食，除了需要有良好的自我控制能力之外，还需要对各种食物的份量有很好的衡量和控制，以保证饮食结构的合理搭配。
Different types of receptors expressed by natural killer (NK) cells may selectively recognize their specific ligands on some other cells and provide self-regulatory signals to control NK responses.
自然杀伤细胞通过其表达的不同类型的受体选择性识别细胞表面的相应配体，提供自然杀伤细胞反应的自我调节信号。
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