required attribute

常见例句

Many attributes have default values, but only the required attribute must be assigned a value.
許多屬性具有缺省值，但衹有必需屬性必須分配值。
When you use this form of the c:forEach> tag, the items attribute is the only required attribute.
儅使用這種形式的 c:forEach> 標記時， items 屬性是唯一必需的屬性。
Unlike the REQUIRED attribute, the MANDATORY attribute will not start a transaction if one does not exist, but rather will throw an exception indicating that a transaction is required.
與 REQUIRED 屬性不同，MANDATORY 屬性將不會開始不存在的事務，而是拋出一個異常，指示需要事務。