null set

常見例句

When a change is made to a relationship, the related foreign-key property is set to a null value.
對關(guān)系進行更新時，相關(guān)的外鍵的屬性設(shè)置為空值。
If the pszText member is non-NULL, return TRUE to set the item's label to the edited text. Return FALSE to reject the edited text and revert to the original label.
處理這個通知，查找是否有同名項，如果是則返回FALSE，否則將編輯后的文字復制到節(jié)點。
However in this case, the link's ref attribute will be set to the value "null," and the link's text content will be hidden unless a flag to show null-link content is set to true.
但是，在這種情況下，這個鏈接的 ref 屬性會設(shè)置為 “null” 值，而且鏈接的文本內(nèi)容會隱藏起來，除非將顯示空鏈接內(nèi)容的標志設(shè)置為 true。