例句：
We followed the bear's tracks in the snow.
我们跟着熊在雪地上留下的足迹走。
The little boy cuddled the teddy bear close.
小男孩紧紧地搂着玩具熊。
You people without kids don't know you're born.
你们没孩子，真是身在福中不知福啊。
