Six birds have just been trained to pick up rubbish at a French historical theme park.

法国一家历史主题公园训练出了六只会自己捡垃圾的鸟。

We can pick up rubbish if we see it.

我们可以拿起垃圾，如果我们看到它。

We must pick up rubbish and keep our city clean.

我们必须捡起垃圾，保持城市清洁。