1. How can the researchers follow the gibbons?
The best way to follow the gibbons is by sound at present.
2. What can we do to protect the endangered animals?
We can protect the endangered animals by researching and protecting them, such as establishing databases, studying their characteristics and behaviors, and taking measures to protect their living environment.
答案：1. The best way to follow the gibbons is by sound at present.
2. We can protect the endangered animals by researching and protecting them, such as establishing databases, studying their characteristics and behaviors, and taking measures to protect their living environment.
