名词
中文翻译：不必要的东西
同义词：
['nonsense', 'rubbish', 'junk']
例句：
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1. He threw away the old newspapers because they were no longer useful.
他扔掉了旧报纸，因为它们已经没用了。
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2. The useless toy was a complete waste of money.
这个无用的玩具完全是金钱的浪费。
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3. Don't throw away your old books;they might be useful for someone else.
不要扔掉你的旧书，它们可能对别人有用。