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
You ordered enough for three or four people,but I'm not complaining.
你叫了够三到四个人吃的菜，但我毫不在意。
Short acquaintance brings repentance.
浅交生后悔。
'Do not touch the exhibits. Some of them are dangerous!'
“切勿触摸展品，某些展品有危险！”