the simultaneity of X and Y
The simultaneity of the two explosions was captured on video.
两起爆炸的同时发生被视频记录了下来。
同时发生；同时性
多个音乐织体同时发声；同时性；同时发生。；多种完整音乐织体同时出现,最早见于查尔斯·艾夫斯作品,常见于康隆·南卡罗等人的音乐中。；同时；[计] 同时性
同时性；同时发生。
The quality or state of being simultaneous; simultaneousness.
多种完整音乐织体同时出现,最早见于查尔斯·艾夫斯作品,常见于康隆·南卡罗等人的音乐中。
More than one complete musical texture occurring at the same time. This first appeared in the music of Charles Ives, and is common in the music of Conlon Nancarrow, and others.
The simultaneity of the two explosions suggested they were connected.
两起爆炸的同时发生表明它们之间存在关联。
用法提示：名词作主语，表示两事件同时发生。
In Einstein's theory, the concept of simultaneity is relative to the observer's frame of reference.
在爱因斯坦的理论中，同时性的概念与观察者的参照系相关。
用法提示：名词作主语，指物理意义上的同时性。
The multitalented artist performed a painting and a song with remarkable simultaneity.
这位多才多艺的艺术家惊人地同时进行了绘画和唱歌。
用法提示：名词作介词宾语，表示两动作同时进行。
The simultaneity of the two explosions was captured on video.
两起爆炸的同时发生被视频记录了下来。
There is a remarkable simultaneity between the economic crises in different countries.
不同国家的经济危机之间存在着显著的同步性。
Simultaneity in the occurrence of these events suggests a common cause.
这些事件的同时出现暗示着一个共同原因。
常暗示偶然性，不完全等同 simultaneity
较正式，多用于书面语或法律语境，可与 simultaneity 互换
技术术语，普通语境下不宜替代 simultaneity
常用于统计、语言学，侧重出现而非时间精确同步
grammar · medium
易错句子The simultaneity events happened at the same time.
正确表达The simultaneous events happened at the same time.
simultaneity 是名词，不能直接修饰名词，应使用形容词 simultaneous。
grammar · medium
易错句子The simultaneous of the two explosions was unexpected.
正确表达The simultaneity of the two explosions was unexpected.
simultaneous 是形容词，不能作名词，而 simultaneity 是名词，表示同时性。
作为 simultaneity（同时性）的反义词，指不同时发生或存在。
拼写相近，simultaneity指“同时性”，simulation指“模拟”，二者含义不同。
词性不同，simultaneity是名词，simultaneous是形容词，用法易混。
语义相近但侧重“协调一致”，simultaneity侧重“时间相同”。
事件的同时发生
The simultaneity of the two explosions was puzzling.
两起爆炸同时发生令人费解。
同时性的感知
Our perception of simultaneity can be fooled by delays.
我们对同时性的感知可能因延迟而产生错觉。
同时性的概念
Einstein's theory challenged the concept of simultaneity.
爱因斯坦的理论挑战了同时性的概念。
缺乏同时性
The lack of simultaneity caused confusion in the relay.
缺乏同时性导致了接力赛中的混乱。
精确同时性
Exact simultaneity is difficult to achieve in distributed systems.
在分布式系统中精确同时性很难实现。
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Dictionary facts from ECDICT, WIKTIONARY.