有健康和均衡的饮食to have a healthy, balanced diet均衡的食物使你的身体获得营养.A balanced diet provides nutrition for your body.均衡的食谱是防止营养不良的保证.A balanced diet is an insurance against malnutrition....
The function of the thymus was unknown until relatively recently.直到不久以前,人们对胸腺的功能尚不明了.In children under the age of two years the thymus often obscures the upper cardvovascular borders.两岁以下的儿童胸腺常常遮盖上部分心血管边缘.Conclusion: Pol...