I'm not accustomed to running in the open without trees. And the oxygen deprivation kicks my butt.
我还是不太习惯在没有树的旷野中跑步，稀薄的氧气著实让我吃尽苦头。
Without trees, Haiti lost its topsoil through erosion, crippling agriculture.
没有了树木，海地土壤流失，重创了当地农业。
Without trees, many animals can not live on the earth. It's not easy for man to live on the earth, either.
没有树木，许多动物不能在地球上生活，人类在地球上生活也不容易。
Trees are useful to man in three ways. Firstly, they provide man with food, wood and other products. Without trees, animals could not live on the earth.
树对人的益处有三个方面。首先，它们给人类提供了食品、木材及其他产品。如果没有树，动物无法在地球上生存下去。
Trees are useful to man in three ways. Firstly, they provide man with food, wood and other products. Without trees, animals could not live on the earth.
树对人的益处有三个方面。首先，它们给人类提供了食品、木材及其他产品。如果没有树，动物无法在地球上生存下去。
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