Management stressed the necessity of backing up all client files before the system upgrade.

管理階層強調在系統升級前備份所有客戶檔案的必要性。

Because of the port strike, we rerouted the shipment through Busan out of necessity.

由於港口罷工，我們不得不將這批貨改經釜山轉運。

The interviewer questioned the necessity of a second interview round for internal candidates.

面試官質疑內部應徵者是否有必要進行第二輪面試。