This chimpanzee is about to send a message.

这头黑猩猩马上就要发送一个信息。

The drumming can travel 1km through the jungle.

敲打声可以在丛林中传播一公里。

Drumming on tree roots allows them to say where they are and what they're doing.

敲打树根可以让黑猩猩说出自己在哪里、在做什么。

Scientists have shown that each chimpanzee in Uganda has their own drumming style. 

科学家已经证明，乌干达的每头黑猩猩都有自己独特的敲打风格。

They're more likely to drum when alone or in small groups.

当黑猩猩独自一人或在小群体中时，更有可能做出这种敲打行为。