建立一个全球性的免疫系统
所获得的免疫性一般是短暂的，须激发注射。
The immunity achieved is generally brief and must be boosted .
所获得的免疫性一般是短暂的，须激发注射。
The immunity achieved is generally brief and must be boosted.
获得性免疫缺损综合症(艾滋病)就是这样一种病。
有一争议性的理论认为输血会导致免疫系统功能减弱。
There is a controversial theory that transfusions can cause decreases in immune function.
其诱导保护性免疫的机制尚待进一步研究。
The mechanism of its inducing protective immunity needs to be studied further.
免疫学是一门理论性强、内容繁杂的学科。
As a theoretical and complicated subject, Immunology is difficult to learn.
免疫学是一门理论性强、内容繁杂的学科。
As a theoretical and complicated subject, Immunology is difficult to learn.
应用推荐