Even if your office keeps a stash of plastic silverware in the kitchen, bring your own to avoid unnecessary waste.
即使你们办公室在厨房配有塑料餐具，你也应该自带餐具以免造成不必要的浪费。
If you can't take out to remove battery anode also, (remember must be negative), this can avoid unnecessary waste electricity.
如果不能取出也要摘掉蓄电池的负极，(记住一定是负极)，这样可以避免电量的没必要浪费。
We should based watershed as a unit for unified planning and optimizing allocation of water resources in order to avoid water waste and unnecessary water dispute.
应以流域为单元，进行统一规划，统一优化配置水资源，避免流域水资源的浪费和不必要的水利纠纷发生。
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