1
timed to do something
常用于被动语态。
The bomb was timed to explode at midnight.
炸弹被定时在午夜爆炸。
定时的；在特定时间进行的
先理解核心含义，再看它在真实句子里的用法。
定时的；在特定时间进行的
Happening at a certain time.
The bomb was timed to explode at midnight.
炸弹被定时在午夜爆炸。
在特定时间发生的。
Happening at a certain time.
由时间调节的。
Regulated by time.
The listening test is timed, so don't spend too long on each question.
听力测试是限时的，所以不要在每个问题上花太长时间。
We did a timed writing exercise in class to improve our speed.
我们在课堂上做了一次限时写作练习，以提高速度。
She won the timed competition because she finished the puzzles fastest.
她因为最快完成拼图而赢得了限时比赛。
常用于被动语态。
The bomb was timed to explode at midnight.
炸弹被定时在午夜爆炸。
The meeting is timed for 3 PM.
会议定在下午3点。
The device is timed at 30 minutes.
设备设定为30分钟。
Not this
The experiment is timing to last one hour.
Use this
The experiment is timed to last one hour.
形容词'timed'表示'被设定时间的'，而'timing'是现在分词或名词，不能用作表语表示设定时间。
Not this
The light is timed for turn off at midnight.
Use this
The light is timed to turn off at midnight.
'timed'后通常接不定式'to do'表示设定做某事的时间，而不是介词'for'加动词原形。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
定时释放
This pill has a timed release, so it works all day.
这种药片是定时释放的，所以能全天有效。
限时测试
The students had ninety minutes to finish the timed test.
学生有九十分钟完成限时测试。
定时入场
The museum requires a timed entry ticket.
博物馆要求持有定时入场票。
限时挑战
She completed the timed challenge in under ten minutes.
她在十分钟内完成了限时挑战。
定时开关
A timed switch turns the lights on at dusk.
定时开关会在黄昏时开灯。
时机得当的；及时的
Your comment was well-timed and helped calm everyone down.
你的评论时机正好，帮助大家冷静了下来。
时机不当的；不合时宜的
The announcement was ill-timed, coming right after the layoffs.
这个公告发布得不是时候，正是在裁员之后。
时机把握得恰到好处
The comedian's entrance was timed to perfection, landing right after the punchline.
这位喜剧演员的出场时机把握得恰到好处，正好在笑点之后。
适时的沉默比言语更具说服力。
A famous quote from Martin Farquhar Tupper's 'Proverbial Philosophy' (1838), often cited as a proverb about the power of well-judged silence.
出自马丁·法夸尔·塔珀的《谚语哲学》（1838年），常被引为格言，讲的是恰如其分的沉默所具有的力量。
Use timed naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
time（时间）加个 d，像给事情定好了时间点：定时的、限时的。
语域：neutral 常见场景：限时测试或比赛、定时释放装置或药物、安排好的活动或行程 作为形容词，timed 通常表示“限时的”或“定时的”，多用于修饰考试、比赛、设备或活动等。比较常见于教育、科技和日程安排场景，语气中性，正式或非正式场合都可用。
常见用法：定语或表语，如a timed test, the test is timed。
Dictionary facts from ECDICT, WIKTIONARY, WORDNET.