名词
中文翻译：注册者
同义词：
['register', 'registrar', 'participant例句：1. The registrant must provide a valid ID and proof of address.（注册者必须提供有效的身份证明和地址证明。）']
例句：
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1. The registrant must provide a valid ID and proof of address.
注册者必须提供有效的身份证明和地址证明。
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2.The registrant was required to complete a registration form before the event.
注册者在活动开始前需要填写一份注册表。
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3. The registrant's information is confidential and will not be shared with any third party.
注册者的信息是保密的，不会与任何第三方共享。