indication of the presence of disease

例句：

1. 1.The doctor gave me a clear indication of the cause of my illness.
   医生给我明确的指示，指出了我的疾病原因。
2. 2. The new policy has given us an indication of what to expect in the future.
   新政策给了我们对未来的预期指示。
3. 3. The scientist's findings provide an indication of how the environment is changing.
   科学家的发现提供了环境变化的暗示。