That vector is called a "null vector".
那种矢量就叫做”零矢量“。
An expressing vector of major outer-membrane protein of Chlamydia psittaci was constructed.
构建了鹦鹉热衣原体主要外膜蛋白的表达载体。
This research intended to construct a eukaryotic expression vector with a site-directed mutation of porcine MSTN propeptide gene.
本研究旨在构建具有猪 MSTN 前肽基因定点突变的真核表达载体。
Well, the first observation is that the velocity vector what can I say about the velocity vector of this motion?
首先，第一个观察到的就是速度向量,关于这个运动中的速度向量，我可以说点什么呢？
We dot our favorite vector field with it.
用我们喜欢的向量场来点乘它。
The normal vector pointing up, here we know what it means.
法向量指向上，这里我们知道它是什么意思。
Each measurement site is a linear vector of temperature values.
每一个测量位置是温度值的一个线性向量。
Life is a soaring vector, and that vector is "progress". This is the exact same notion of progress offered by Hawking.
人生就是一条冲向高空的航线，这条航线叫做“进步”，与霍金提出的“进步”的概念完全一致。
The key to understanding this all is vector arithmetic.
理解这一切的关键在于向量算术。
Later articles in this series will deal with vector operations.
本系列的后续文章会深入介绍向量运算。
That corresponds to normal vector pointing up.
那相当于法向量指向上。
它构成一个矢量。
Because I have to use the key as the initial vector, I have passed the key as the initial vector byte array.
因为我必须用密钥作为初始矢量，所以将密钥作为初始矢量字节数组传递。
We have a vector field that gives us a vector at every point.
有一个向量场来描述每一个点上的向量。
The curl of a vector field in space is actually a vector field, not a scalar function. I have delayed the inevitable.
空间中的向量场的旋度，是一个向量场，而不是一个标量函数，我必须告诉你们。
These involve vector quantities.
这些则包括向量。
A vector — for example, the camera position — multiplied by the correct matrix for translation results in a vector that moves accordingly.
一个向量——例如，摄像机位置——乘以恰当的平移矩阵从而得到相应移动的向量。
Vector constants are created by putting the type of vector in parentheses followed by the contents of the vector in curly braces.
向量常量的创建方法如下：先是在圆括号中的向量类型，然后是使用花括号括起来的向量内容。
Now, what's the gradient vector?
现在，梯度向量是什么呢？
Geometric vector shapes are often called features, leading to the term feature data, which is synonymous with vector data or shape data.
几何矢量形状通常称为特征，指的是特征数据，它与矢量数据或形状数据是一个意思。
In fact, our vector field and our normal vector are parallel to each other.
事实上，给定的向量场与法向量是相互平行的。
And we have learned how to package partial derivatives into a vector, the gradient vector.
我们也知道了，如何将各个偏导组合成一个梯度向量。
And I can rewrite this in vector form as the gradient dot product the amount by which the position vector has changed.
可以把这些用向量形式重新写下来，就是梯度向量和位置改变量的点积。
In machine learning, the data is often represented as a vector, sometimes called a feature vector.
在机器学习中，数据通常被表示为矢量，有时也称作特征矢量。
I experience a vector quantity.
我经历了一个矢量的量变。
The second is the initial vector byte array.
第二个是初始矢量字节数组。
At the origin, the vector field is not defined.
在原点，向量场是没有意义的。
So, the definition will take effect. The acceleration is as a vector, and the acceleration vector is just the derivative of a velocity vector.
有必要对加速度给出一个严格的定义，加速度,作为一个矢量,是速度的一阶导数。
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