【摘 要】
：
人们把我称作“皮肤”，我具有痛、痒、冷、热、触、压等各种感觉。在３岁以前，我和主人一样，颇为娇嫩，血管丰富，防御功能差，稍遇轻微外力即易引起损伤，无法很好履行职责。此时，小主人神
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人们把我称作“皮肤”，我具有痛、痒、冷、热、触、压等各种感觉。在３岁以前，我和主人一样，颇为娇嫩，血管丰富，防御功能差，稍遇轻微外力即易引起损伤，无法很好履行职责。此时，小主人神经系统尚不完善，导致我对外界的适应能力较差，而处于生长发育阶段的小主人，新陈
People call me “skin,” and I feel pain, itchiness, coldness, heat, touch and pressure. Before the age of 3, I was just as delicate as my host, with rich blood vessels and poor defensive functions. Slight external stress was the minor cause of injuries and could not perform their duties well. At this point, the little host nervous system is not perfect, resulting in poor adaptability to the outside world, while in the growth and development stage of the small masters, new
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