What is registration?翻译成汉语

What is registration?翻译成汉语 Registration is not The registration code is incorrect. your registration information is incorrect registration Registration registration registration registration registration registration registration registration registration your registration is corrupted 是英文懂的说下 英语翻译翻译:Registration Information is available for online courses 谁来解释一下这个介词的用法?on registration ,a trademark is granted for a period of ten years.为什么是on registration 而不 From registration late registration