标签：物种 相关文章
Fear Smells Like Sugar Scientists have suspected for many years that fish might give off a chemical signal to warn other fish about the presence of predators. When a fish in a school is injured, for example, the rest of the school will panic and swim
发表于:2018-12-31 / 阅读(55) / 评论(0)
英语听力文摘 English Digest
英语听力文摘 English Digest