1
simultaneously, [clause]
Simultaneously, the two devices started ringing.
同时，两个设备开始响起。
同时
先理解核心含义，再看它在真实句子里的用法。
同时
at the same time
Simultaneously, the two devices started ringing.
同时，两个设备开始响起。
同时发生地。
Occurring at the same time.
同时
at the same instant
The twins spoke simultaneously, making it hard to understand them.
这对双胞胎同时说话，让人很难理解他们。
AI contextual example
She managed to juggle three tasks simultaneously without any mistakes.
她设法同时处理三项任务而没有出错。
AI contextual example
The fireworks exploded simultaneously, lighting up the entire sky.
烟花同时爆炸，照亮了整个天空。
AI contextual example
they spoke simultaneously
他们同时说话。
WordNet
Simultaneously, the two devices started ringing.
同时，两个设备开始响起。
The two apps simultaneously updated.
两个应用同时更新。
The alarms went off simultaneously.
警报同时响起。
Not this
The two events happened simultaneous.
Use this
The two events happened simultaneously.
“simultaneously”是副词，修饰动词“happened”，而“simultaneous”是形容词，不能修饰动词。应使用副词形式。
Not this
They simultaneously arrived at the station.
Use this
They arrived at the station simultaneously.
英语中，方式副词通常放在动词之后，而不是像汉语那样放在动词之前。因此应将“simultaneously”置于句末。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
同时发生
The two events occurred simultaneously.
这两个事件同时发生。
同时发生
The earthquakes happened simultaneously in different regions.
这些地震在不同地区同时发生。
同时运作
The machines operate simultaneously to increase efficiency.
这些机器同时运作以提高效率。
同时发射
The two satellites were launched simultaneously.
这两颗卫星同时发射。
同时存在
Peace and war cannot exist simultaneously.
和平与战争不能同时存在。
同时进行
The singer performed simultaneously on two stages.
这位歌手在两个舞台上同时表演。
Use simultaneously naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
记忆：'simul'（相同）+ 'taneous'（时间），即同时发生。
中性语体，适用于学术、技术及日常语境。
常用于描述两个动作同时发生
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.