Duration（持续时间）
The duration of the meeting was shorter than expected.
会议持续时间比预期短。
Length 时长
The length of the movie is two hours and fifteen minutes.
这部电影的时长是两小时十五分钟。
Instant 瞬间
The instant the sun rose, the valley was bathed in warm golden light.
太阳升起的瞬间，山谷沐浴在温暖的金色光芒中。
Moment 片刻
Wait a moment, I need to grab my keys before we leave.
等一下，离开前我需要拿钥匙。
While 一会儿
Let me rest for a while before continuing to work.
让我休息一会儿再继续工作。
For ages 长时间
We haven’t seen each other for ages—when was the last time?
我们很久没见面了——上次是什么时候？
For hours 长时间
They talked for hours about their travel experiences.
他们聊了几小时的旅行经历。
For years 多年
Scientists have studied this phenomenon for years.
科学家们研究这一现象已有多年。
Hour 小时
The lecture will last for three hours this afternoon.
今天下午的讲座将持续三小时。
Hourly 每小时
The bus runs hourly from 6 a.m. to 10 p.m.
公交车从早上6点到晚上10点每小时一班。
Hour after hour 连续几小时
He worked hour after hour to finish the report before the deadline.
他连续几小时工作，为了在截止日期前完成报告。
Minute 分钟
The bus will arrive in five minutes.
公交车五分钟后到达。
Second 秒
The athlete finished the race in 9.87 seconds.
这位运动员以9.87秒的成绩完成了比赛。
Fortnight 两星期
We’re going on vacation for a fortnight next month.
我们下个月要去度假两周。
Annual 每年的
The company holds an annual party for employees.
公司每年为员工举办一次聚会。
Yearly 每年的
She gets a yearly check-up at the hospital.
她每年在医院做一次体检。
Age 时代
The Information Age has transformed how we communicate.
信息时代改变了我们的沟通方式。
Era 时代
Dinosaurs lived during the Mesozoic Era.
恐龙生活在中生代。
Epoch（纪元）
The invention of the internet marked a new epoch in human history.
互联网的发明标志着人类历史的新纪元。
Times 时代
In modern times, technology has become indispensable.
在现代，技术已变得不可或缺。
Century 世纪
The 21st century is characterized by rapid technological advancement.
21世纪以快速的技术进步为特征。
Decade 十年
The past decade has seen significant changes in climate.
过去十年里，气候变化显著。
Millennium 千年
The transition to the third millennium was celebrated worldwide.
全球庆祝了第三个千年的到来。
Eternal（永恒的）
Love is often considered an eternal emotion.
爱常被视为一种永恒的情感。
Forever 永远
I’ll love you forever.
我会永远爱你。
Permanent 永久的
After working as a temporary staff member for three years, he was finally hired into a permanent role at the hospital.
作为临时员工工作了三年后，他终于被医院录用了永久职位。
