这些新的后缀没有注册限制，是任何人想注册都可以注册别人还没注册过的域名的。

Many of the new extensions have no registration restrictions and are available to anyone who wishes to register a distinct domain name that has not already been taken.

youdao

对于每一个激活的会话所有的用户都分配有四个小时，对于注册没有限制。

All users are allocated four hours per each active session, with no limits on registration.

youdao

然而，没有一个与Moodle的业务伙伴网络有联系，有些由于没能找到一个可行的业务模型已经关闭或限制注册了。

However, none are connected to Moodle's Partner network, and some have shuttered their doors or restricted registration due to their inability to find a working business model.

youdao