Operational life span
[计] 使用寿命
🧩 词语组成解析
life
[laɪf]
n. 生活，生计;生命，性命;一生，寿命;人生，尘世;
span
[spæn]
n. 共轭（马、骡）;跨度，墩距;一段时间;[航] 跨绳;
vt. 缚住或扎牢;跨越时间或空间;以掌测量;以手围绕测量类似测量;
🗣️ 情景例句
Do you have any magazines I can read during the flight?
你们机上有杂志给我看吗？
If it hadn't been for your help, we would never have finished it.
如果没有你的帮助，我们永远完不成任务。
On Reading
论阅读