形容词
中文翻译：单一的
同义词：
['unique', 'singular', 'sole', 'uniquely例句：1. The single-use plastic bags are banned in the city.（这个城市禁止使用一次性塑料袋。）2. She has a single friend who she can confide in.（她只有一个可以倾诉的朋友。）3. The single mother had to work two jobs just to make ends meet.（这位单身母亲不得不做两份工作才能维持生计。）']
例句：
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1. The single-use plastic bags are banned in the city.
这个城市禁止使用一次性塑料袋。
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2. She has a single friend who she can confide in.
她只有一个可以倾诉的朋友。
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3. The single mother had to work two jobs just to make ends meet.
这位单身母亲不得不做两份工作才能维持生计。