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1. We regard them as unnecessary creatures that do more harm than good.
    我们把昆虫当作害多益少的无用东西。

2. The youngsters frequently show their lack of practice at such things. They take along unnecessary items.
    这些小青年在做这类事的时候常常显得缺乏实践经验。他们带了许多不必要的东西。

3. No,it´s unnecessary for beginning.
    不,开始没必要.

4. No,it´s unnecessary.I don´t think I have a fever.
    不, 没有必要, 我想我没有发烧.

5. We regarded them as unnecessary creatures that do more harm than good.
    我们把它们看作不需要的、害多利少的生物。

6. It´s unnecessary to cooka big meal tonight.
    今晚不必做很多饭.

7. If Americans were really creating more trash by spoiling ourselves with a lot of unnecessary items, we would be spending more on trash-generating items: non-durable goods like food and beauty products.
    如果美国人的确纵容自己购置了许多不必要的用品,从而产生出更多的垃圾,那我们大多是购买了那些制造垃圾的产品: