理想情况下，它应当是一个单字符，而且不能存在于你的数据之中。

Ideally, they should each be a single character, and they should not be found naturally in your data.

youdao

因此，只有在需求存在并将持续存在，而且现有国有医院或经强化的国有医院不能满足此需求时，才应当建立这种医院。

Such hospitals, therefore, should only be provided if a clear and continuing need exists that cannot be met by existing or strengthened national hospitals.

youdao