树木可以在很多方面帮助保护环境，因为它们是污染斗士。
Trees can help protect the environment in many ways because they are pollution fighters.
她是我的精神导师，也是个朋友。她死得太早，她有超凡的个性，是环境的伟大斗士：旺加里·马塔伊。
She was a mentor of mine, she was a friend, she died much too young, she was an extraordinary personality, a great champion of the environment: Wangari Maathai.
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