Many animals use1kinds of "language". They use signals(信号) and the signals have meanings.
For example, when a bee finds some food, it goes back to its home. A bee can't tell other bees where the food is by speaking to them, 2 it can do a little dancing. This tells other bees where the food is and 3 it is.
Some animals show4 they feel by making sounds. 5is not difficult to tell if a dog is angry when it barks(狗叫).
Birds make several different sounds and6 has its own meaning. Sometimes humans (人类) make sounds7. For example, we make sounds like "Oh!" or "Ouch!" to show how we feel about something or when we drop something on our 8.
Humans have languages. We have words. These words9 the meanings of things, actions, feelings or ideas. We are able to give each other information, writing down words. We can remember what happened or send10to people far away.