She worries a lot. She worries about polar bears. They are big, white bears. They live in the north. They need snow. They need ice. They need cold weather. There is too much pollution. Pollution heats up the Earth. Heat melts the ice. The ice is the polar bears’ home. No ice means no home.
    她很擔(dān)心。她擔(dān)心北極熊。他們是大的，白色的熊。他們住在北方。他們需要雪。他們需要冰。他們需要寒冷的天氣。有太多的污染。污染加熱地球。冰熱融化。冰是北極熊的家。沒有冰就意味著沒有家。