对于一个给定的维，有3个wgrow值要考虑：两个边(左和右，或者上和下)和child值本身。
Given a dimension, you have three wGrow values to consider: two of the sides (left and right, or top and bottom) and the child's value itself.
方向-左，右，上，下。
人类思维分类是：黑和白，上和下，左和右。
Humans think in categories: black and white, up and down, left and right.
例如，在一个二维的模型中，每一个位置的可能值是：上、下、左、右。
For example, in a two-dimensional model, the possible values for each position are: up, down, left, and right.
我们只不过是在人生的甩子里不断选择，前是六、后是一、左是三、右是二、上是五、下是四。
We just always throughout our life to choice, face six, back one, left three, right two, up five, down four.
转眼：双手托腮，让眼球按上、下、左、右的顺序转动10次，接着再逆时针、顺时针各转动10次。
Turn: her hands cupping gills, let eye according to the top, bottom, left and right order rotation 10 times, then counterclockwise, clockwise every rotating 10 times.
水只向四个方向流动（上，下，左，右），从一个单元格流向另一个等高或者更低的单元格。
Water can only flow in four directions (up, down, left, or right) from a cell to another one with height equal or lower.
看左，右，上，下。
所述的方向开关分别是上按键、下按键、左按键、右按键。
The direction switch is provided with an up key, a down key, a left key and a right key.
在这个2020网格中，处于任何方向上(上，下，左，右或者对角线)的四个相邻数字的乘积的最大值是多少？
What is the greatest product of four adjacent Numbers in any direction (up, down, left, right, or diagonally) in the 2020 grid?
绘制一个机器人，添加光照、实现胳膊的旋转和用键盘控制机器人的上、下、左、右的旋转动画。
Drawing a robot, add the light, to achieve the rotation of the arm and the robot using keyboard control the upper and lower, left and right rotation animation.
这四个键分别对应了左、下、上、右这四个方向键。
These 4 keys correspond to the left, down, up and right arrow keys respectively.
设备基本结构：一、自动进料成型冲孔切断卸下机构。二、调直部份采用能：上、下、左、右调动保正滑轨质量标准，方便技术人员的调动。
Equipment basic structure: 1, automatic feed, forming, punching, cutting, unloading. 2, transfer straight over to the right part of the mobilization of slide quality standards.
Sara喜欢一上一下地干，而我却喜欢一左一右地干。
Sara likes doing it up_and_down, _and_I like doing it left to right.
右房除2例外均有不同程度的增大，左房有4例增大，19例发现有上、下腔静脉扩张。
Dilated right atrium was seen in 22 patients, while dilated left atrium in 4, dilated SVC and IVC in 19 patients.
Sara喜欢一上一下地干，而我却喜欢一左一右地干。
Sara likes doing it up and down, and I like doing it left to right.
Sara喜欢一上一下地干，而我却喜欢一左一右地干。
Sara likes doing it up and down, and I like doing it left to right.
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