You are allowed to attend any lecture, only if there are empty seats for you and you don't disturb the class.
只要教室里还有空位，你又不扰乱课堂，你就可以旁听任何课。
The value of the remaining letters written in the a | a format. If there are no letters left, the value is empty; otherwise, you call the template recursively.
用a | a格式写的剩余字母的值如果已没有字母，则该值为空；否则，递归调用该模板。
The other unused entry points, if any, are automatically mapped to empty functions, thus there is no need to use Adapter classes.
其他未使用的入口点(如果有的话)自动映射到空函数，因此这里不需要使用Adapter类。
So, if you are sure there was data in that empty database, check for typing errors.
所以，如果您肯定那个空数据库中存在数据，请检查是否有录入错误。
If there are an odd number of miners, then the core is empty.
如果有奇数个挖矿者，那么中心为空。
Have you (found for) if there are any rooms left? Yes. all of the rooms are (empty).
你有没有找到有剩下(可住)的房间？是的，所有的房间都空着。
If that nodes are not empty, there is no deletion.
如果该节点不是空的，是不能被删除的。
If you're getting hungry and the level in which you currently are is empty of food, try going down a level, there might be some food.
如果你开始饿了，而你在的楼层也没食物了，就往下层楼去吧，那边应该有点食物。
Returns an array of all of the custom attributes defined on this member, excluding named attributes, or an empty array if there are no custom attributes.
返回在此成员上定义的所有自定义特性(命名特性除外)的数组，或如果没有自定义特性，返回一个空数组。
Returns an array of custom attributes defined on this member, identified by type, or an empty array if there are no custom attributes of that type.
返回此成员上定义的自定义特性的数组（由类型标识），如果该类型没有自定义特性，则返回空数组。
Returns an array of custom attributes defined on this member, identified by type, or an empty array if there are no custom attributes of that type.
返回此成员上定义的自定义特性的数组（由类型标识），如果该类型没有自定义特性，则返回空数组。
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