The new office printers have an expected lifetime of about five years with normal daily use.

新的辦公室印表機在正常每日使用下，預期使用壽命約為五年。

Accountants spread the cost of the delivery trucks over their estimated lifetime of ten years.

會計人員將送貨卡車的成本分攤在其預估十年的使用壽命中。

Our support agent explained that cleaning the filters monthly will extend the air conditioner's lifetime.

我們的客服人員說明，每月清潔濾網可以延長冷氣機的使用壽命。