形容词
中文翻译：免费的
同义词：
['unlimited', 'unlimitedly']
例句：
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1.The free samples are a great way to try the product before buying it.
免费样品是尝试产品之前购买它的好方法。
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2. He has been offered a free trip to Europe for his birthday.
他的生日被提供了一次免费的欧洲之旅。
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3. The company offers free shipping on orders over $50.
该公司对订单超过50美元的部分提供免费快递服务。