人体免疫系统好比是一个国家的军队和武装警察,人体内时刻进行着免疫之战,随时抵御外来入侵的细菌和病毒,不停地监视着体内的非己成分。“工欲善其事,必先利其器”,随着医学技术的不断发展,科学家已为人体免疫系统提供了不少新式战斗武器,以更好地为人类健康服务。 The body’s immune system is like a national army and armed police. People in the body are constantly engaged in an immunization war against foreign invading bacteria and viruses at any time and constantly monitoring the non-constituents in the body. “Workers want to be good, must first sharpen their tools.” With the continuous development of medical technology, scientists have provided the body’s immune system with many new-style combat weapons to better serve human health.