名词
中文翻译：标志
同义词：
['token', 'indicator', 'symbol']
例句：
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1. The sign of the new moon is a crescent moon.
新月的标志是一个新月。
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2. The policeman gave him a stern look as he walked past.
警察在他经过时严厉地看了他一眼。
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3. The sign outside the store said "Closed for the day."
商店外面的招牌写着“今天关门”。