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Now the ecosystem is sothat the balance will be broken sooner or later if we keep exploiting nature.
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Tothe persons in a sentence, you are not advised to use too many pronouns. For example, you can use the names of the people you are referring to.
In the era of the Internet, the older generation are alwaysby some spoken words used in the virtual world. The meanings of some words are totally different from the meanings people are familiar with in the real world.
The state’s blood supplies were severely ______ by the two consecutive disasters.
男孩，3岁，在独自玩塑料子弹时突然出现呼吸困难，吸气时胸骨上窝、锁骨上窝和肋间隙明显凹陷，该病最可能是
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