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。
Even if your office keeps a stash of plastic silverware in the kitchen, bring your own to avoid unnecessary waste.
广告误导消费者，让消费者冲动消费。造成不必要的浪费。
Advertising can mislead consumers, and make them buy products on a whim, causing unnecessary waste.
由于垃圾的特性多变以及处理方式的不同，统一的处理系统不仅难以达到处理垃圾的要求，而且可能造成不必要的浪费。
Due to the various characteristics of MSW and different methods of disposal, a uniform system cannot meet the needs to dispose MSW but cause unnecessary waste of resources.
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