1
the fluidity of [sth]
指液体容易流动的性质。
The fluidity of water allows it to fill any container.
水的流动性使它能够填满任何容器。
流动性；流质
fluidities — plural of fluidity
先理解核心含义，再看它在真实句子里的用法。
流动性；流质
the property of flowing easily
The fluidity of water allows it to fill any container.
水的流动性使它能够填满任何容器。
具有流动性而非黏稠性的状态
The state of being fluid rather than viscous
物质流动程度的量度；黏度的倒数
A measure of the extent to which something is fluid. The reciprocal of its viscosity.
流动或自由流动的性质
The quality of being fluid or free-flowing
The fluidity of water makes it ideal for filling any container.
水的流动性使它非常适合填充任何容器。
When the oil is cold, its fluidity decreases and it becomes hard to pour.
当油冷却时，它的流动性会降低，变得难以倒出。
Scientists measure the fluidity of different liquids to understand how they behave in pipes.
科学家测量不同液体的流动性，以了解它们在管道中的表现。
指液体容易流动的性质。
The fluidity of water allows it to fill any container.
水的流动性使它能够填满任何容器。
此处指事物不固定、易变化的状态，常用于抽象概念。
There is a growing fluidity in how people define their careers.
人们在定义自己的职业方面有了越来越大的可变性。
Not this
This syrup is very fluidity.
Use this
This syrup is very fluid.
fluidity 是名词，意为“流动性”，不能在系动词 be 后作表语形容词；描述某物容易流动时应用形容词 fluid（流动的）。改为 fluid 后，句子结构和意义都正确。
Not this
The fluidity of these liquids are different.
Use this
The fluidity of these liquids is different.
这句话的主语是 fluidity（单数），介词短语 of these liquids 只是修饰语，所以谓语动词要用 is 而不是 are。学习者常因后面的 liquids 是复数而误用 are，须按中心词 fluidity 确定单复数。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
性别流动性
The concept of gender fluidity challenges traditional categories.
性别流动性这一概念挑战了传统的分类。
社会流动性
Education is seen as a key driver of social fluidity.
教育被视为社会流动性的关键驱动因素。
动作的流畅性
The dancer's fluidity of movement captivated the audience.
舞者动作的流畅性令观众着迷。
水的流动性
The fluidity of water allows it to adapt to any container.
水的流动性使其能够适应任何容器。
性取向的流动性
Research on sexual fluidity suggests it can change over time.
关于性取向流动性的研究表明它可能随时间变化。
Use fluidities naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
联想 fluid（流体）加后缀 -ity，fluidity 就是‘流动性’；想象水能自由流动，也指易变的特质。
语域：mixed 常见场景：scientific/technical texts、social science/gender studies 该词多用于正式或学术语境：在物理/化学等学科中指“流动性”，在社会科学、性别研究等中指“易变性、不确定性”。日常口语中比较少见，语气随学科领域而变化。
These words all share the final -idity /ˈɪdɪti/ pattern and rhyme with fluidity. Note that 'fluid' (/ˈfluːɪd/) looks similar but is pronounced differently and does not rhyme.
Dictionary facts from ECDICT, WIKTIONARY.