A flashing set of healthy and clean, regular 'pearly whites' was a rare sight in Victorian society, the preserve of the super-rich (and even then, dental hygiene was not guaranteed).
在维多利亚时代，一副闪闪发亮的健康、干净、整齐的“珍珠白”牙齿是非常罕见的，只有超级富豪才能拥有（即便如此，在那个时代，口腔卫生无法得到保证）。
The source can be a super-set of the target.
源可以是目标的一个超集。
This means that there is only a single pool of users and groups in the LDAP directory to work with and that there can be only one set of super Portal administrators.
这表示在 LDAP 目录中只有一个单独用户池和组可以处理，并且只能有一组超级门户管理员。
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