主题公园的经营需达到能自负盈亏，具有回收成本的能力。
Theme park operations need to be self-financing, with the ability to recover costs.
与其他方法比较，该方法具有回收率较高，便捷、高效的特点。
The method has high recovery, and is simple and efficient, compared with other methods.
废旧手机一方面对环境构成潜在危害，一方面又具有回收利用的价值。
On the one hand, waste mobile phones cause a latent harm to environment, on the other hand, they can be recovered and reused.
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