仿写：可能有一些潜在的健康问题还没有表现出来。

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　　答案　有时，感染者没有外部症状。

　　Potential health problems may be latent and might not have shown as outward symptoms.

　　2．As the immune system weakens，it loses the ability to fight illnesses.

　　翻译：_________________________________________________

　　仿写：随着时间的流逝，细节被忘却，主要的轮廓保留下来。

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　　答案　随着免疫系统的减弱，它失去了同疾病作斗争的能力。

　　As time passes，the details drop away and only the broad outlines remain.

　　3．The government is working hard to control the Aids epidemic，and has opened labs to test and monitor the disease.

　　翻译：________________________________________________

　　仿写：她很用功，唯恐落在别人后面。

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　　答案　政府努力工作控制艾滋病传染，并开办了实验室检验和监控这种疾病。

　　She is working hard for fear(that)she should lag behind others.

4．All of this makes it clear that something must be done to stop this