variable quantity
常见例句
- Secondly, the number of unusual words in any author is a variable quantity.
其次，一些不寻常的词作者是在任何一个变量的数量。 - A symbol that is used in mathematical or logical expressions to represent a variable quantity .
用在数学或者逻辑表达式里代表一个可变量的符号。 - Because the brake clearance is influenced by axis moving, the swing of disk brake, its result is a variable quantity.
提升机闸瓦间隙大小受到轴窜、偏摆等的影响，所以其值是一个动态变化的量。 - The basic definition-- the expected value of some random variable x--E--I guess I should have said that a random variable is a quantity that takes on value.
最基本的定义,某一个随机变量X的期望值E,我应该提到过,随机变量是一个可以取值的数
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