重要：在操作阶段仅允许修改内容树。

Important: Modifications of the content tree are only allowed in the action phase.

youdao

这将仅允许经过身份验证的浏览器进入。

This will allow only authenticated browsers to get in.

youdao

此组中的策略仅允许注册客户执行这些命令。

The policies in this group only allow these commands to be executed by registered customers.

youdao

In those situations, you might say, and only in those situations, is it permissible to violate the precepts of ordinary morality.

在那些情势下，也可以说，仅在那些情势下，才能允许违背,寻常道德的戒律。

耶鲁公开课 - 政治哲学导论课程节选

For these purposes think about a channel, it only allows sodium to go through for example.

基于此目的,我们来讲离子通道,拿仅允许钠离子通过的通道作为例子

耶鲁公开课 - 生物医学工程探索课程节选