As you probably know, postal codes vary widely throughout the world.
您可能知道，在世界的不同地方，邮政编码千差万别。
Dress codes vary by school district and are often applied at the discretion of teachers and school administrators.
每个学区的着装守则都不相同，具体实施往往凭老师或学校管理员的主观裁定。
Common diagnostics include beep codes (which vary from vendor to vendor) or diagnostic codes that can be written out to a specific raw address.
通常的诊断包括响铃代码(不同供应商提供的代码都不相同)，或者可以写入到某个特定裸地址的代码。
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