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New tree seedlings will not survive to reach the canopy level unless

【参考答案】

some old trees die
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Virtually all plant and animal species on Earth can be found in tropical rainforests.
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目前盗版的现象比较严重2. 造成这种现象的原因及其危害3. 我们应该怎么做 Useful words and expressions: 盗 版: piracy (n.) 盗版产品: pirated products 知识产权: intellectual property rights 侵犯版权: infringe sb’s copyright; copyright infringement Say No to Pirated Products
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