When they were kids, Dereck was quiet and healthy, he was good at math and science.
当他们还是孩子的时候,Dereck 安静又健康,他擅长数学和科学。
I tell my family about the science and psychology of a good healthy cleaning at spring's arrival.
我告诉家人在春天到来时进行健康大扫除的科学和心理学知识。
Based on the latest science, and unaffected by businesses and organizations with a stake in its messages, the health Eating Pyramid is a simple, trustworthy guide to choosing a healthy diet.
根据最新的科学知识,并不受商业和有利害关系的组织的信息的影响,这个健康饮食金字塔简单,值得信任,能引导你选择健康的饮食规律。
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