the swiftness of [sth]
用 of 引出具体行为或事物。
The swiftness of her response surprised everyone.
她回应的迅速让所有人惊讶。
迅速；快速
快
a rapid rate at which something happens; quickness
迅速；快速。
The state of being swift.
The cheetah's swiftness allows it to catch prey that other hunters cannot.
猎豹的迅速使它能够捕捉到其他猎手无法捕获的猎物。
用法提示：swiftness 此处为名词，作主语，表示“迅速”这一特性。
We were amazed by the swiftness of her reply to our question.
我们对她回答问题的迅速感到惊讶。
用法提示：swiftness 作介词 by 的宾语，名词用法，强调反应速度快。
His swiftness in making decisions impressed the whole team.
他做决定的迅速给整个团队留下了深刻印象。
用法提示：swiftness 作主语，后接 in doing sth，名词表示“迅速”的行为特征。
用 of 引出具体行为或事物。
The swiftness of her response surprised everyone.
她回应的迅速让所有人惊讶。
作状语，修饰动词。
The athlete moved with swiftness and grace.
这位运动员动作迅速而优雅。
grammar · medium
易错句子He is swiftness.
正确表达He is swift.
“swiftness”是名词，不能用作形容词；应改为形容词“swift”。
grammar · medium
易错句子He has swiftness.
正确表达He moves with swiftness.
“have swiftness”不符合英语习惯，表达“迅速”时常用“move with swiftness”或直接用形容词“swift”。
speed 强调速率或速度大小，常用于物理或日常语境；swiftness 强调动作的敏捷和迅速，更具修辞色彩
rapidity 强调变化或发生得快，常与率或进程连用；swiftness 更侧重动作的轻快和及时
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