Word
liftoff
升空；起飞；发射
the initial ascent of a rocket from its launching pad
- 1.
The point in the launch of a rocket or an aircraft where it leaves contact with the ground.
火箭或飞机发射时离地的瞬间。
- 2.
the initial ascent of a rocket from its launching pad
火箭从发射台初始升空
- 3.
The point at which a person or animal leaves the ground, as for example when jumping.
人或动物(如跳跃时)离地的瞬间。
- 4.
The point of launching into success or action.
启动成功或行动的起点。
火箭或飞机发射时离地的瞬间。；火箭从发射台初始升空；人或动物(如跳跃时)离地的瞬间。；启动成功或行动的起点。；(火箭发射时)起飞
In use
Liftoff occurred exactly at 9:30 a.m., and the rocket rose into the sky.
The entire team held their breath during the liftoff of the new satellite.
Mission control delayed the liftoff due to high winds.
the liftoff of [noun]
liftoff 是名词，常用 of 引出发射的运载工具。
The liftoff of the rocket was delayed by strong winds.
火箭的升空因强风而推迟。
at liftoff
at liftoff 表示“在升空时”，用作时间状语。
The cameras recorded the moment at liftoff.
摄像机记录了升空那一刻。
liftoff from [place]
liftoff 后接 from 可表示发射地点。
Connections
Collocations
- scheduled liftoff
- 预定发射
- The scheduled liftoff was delayed by bad weather.预定发射因天气恶劣而推迟。
- liftoff time
- 发射时间
- The liftoff time has been set for 9 a.m.发射时间已定在上午9点。
- liftoff sequence
- 发射程序
- Engineers checked the liftoff sequence one last time.工程师们最后一次检查了发射程序。
- smooth liftoff
- 顺利升空
- The rocket had a smooth liftoff from the launchpad.火箭从发射台顺利升空。
- minutes before liftoff
- 发射前几分钟
- The crew boarded the capsule minutes before liftoff.机组人员在发射前几分钟进入太空舱。
Pop culture & quotes
Learner notes
Memory Tip
把 liftoff 拆成 lift（举起）+ off（离开）：火箭被发射台“举起”后“离开”地面，就是升空。
Context & Register
语域：neutral 常见场景：航天/火箭发射、新闻报道、技术说明 liftoff 通常用于航天或火箭发射场景，指火箭离开发射台的初始上升动作，也见于新闻报道或技术说明中。日常口语中较少用，更常说 launch 或 takeoff。
Pronunciation & Spelling
在给定发音 /ˈlɪfˌtɔf/ 中，结尾 /tɔf/ 与 off、cough（美音）、toff、scoff 的 /ɔf/ 同韵。注意拼写近似的 lift /lɪft/ 和 toffee /ˈtɔfi/ 读音不同。
Learn the forms together
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from ECDICT, WIKTIONARY.