1-js/02-first-steps/04-variables (javascript-tutorial#32)

* Transfer the existing translation

Co-authored-by: maoxiaoke <thebigyellowbee@qq.com>

resolve javascript-tutorial#4

* fix(variables): Adjust some contents

* fix(variables): translate more tasks and solutions

* 👌 fix: Adjust some words due to code review changes

Signed-off-by: sqrtthree <imsqrtthree@gmail.com>

* Update task.md

* Update article.md

* fix: Remove some spaces due to code review changes

Signed-off-by: sqrtthree <imsqrtthree@gmail.com>

Author: linhe0x0

1-js/02-first-steps/04-variables/1-hello-variables/solution.md

@@ -1,7 +1,7 @@
-In the code below, each line corresponds to the item in the task list.
+下面的代码，每一行都对应着任务列表中的对应项。
 
 ```js run
-let admin, name; // can declare two variables at once
+let admin, name; // 一次声明两个变量。
 
 name = "John";
 

1-js/02-first-steps/04-variables/1-hello-variables/task.md

@@ -2,9 +2,9 @@ importance: 2
 
 ---
 
-# Working with variables
+# 使用变量
 
-1. Declare two variables: `admin` and `name`.
-2. Assign the value `"John"` to `name`.
-3. Copy the value from `name` to `admin`.
-4. Show the value of `admin` using `alert` (must output "John").
+1. 声明两个变量：`admin` 和 `name`。
+2. 将值 `"John"` 赋给 `name`。
+3. 从 `name` 变量中拷贝其值给 `admin`。
+4. 使用 `alert` 显示 `admin` 的值（一定会输出 "John"）。

1-js/02-first-steps/04-variables/2-declare-variables/solution.md

@@ -1,21 +1,21 @@
-First, the variable for the name of our planet.
+首先，声明变量代表我们星球的名字。
 
-That's simple:
+这很简单：
 
 ```js
 let ourPlanetName = "Earth";
 ```
 
-Note, we could use a shorter name `planet`, but it might be not obvious what planet it refers to. It's nice to be more verbose. At least until the variable isNotTooLong.
+注意，我们也可以用一个更短的名字 `planet`，但是它可能并不清楚它指的是什么行星。再啰嗦一点也是挺好的。至少直到这个变量“不太长”就行。
 
-Second, the name of the current visitor:
+第二，定义当前浏览者的名字：
 
 ```js
 let currentUserName = "John";
 ```
 
-Again, we could shorten that to `userName` if we know for sure that the user is current.
+还有，如果我们的确知道用户就是当前的用户的话，我们可以使用更短的 `userName`。
 
-Modern editors and autocomplete make long variable names easy to write. Don't save on them. A name with 3 words in it is fine.
+现代编辑器的自动补全可以让长变量名变得容易书写。不要浪费这个特性。一个名字中包含三个词就挺好的。
 
-And if your editor does not have proper autocompletion, get [a new one](/editors).
+如果你的编辑器没有合适的自动补全，换[一个新的吧](/editors)。

1-js/02-first-steps/04-variables/2-declare-variables/task.md

@@ -2,7 +2,7 @@ importance: 3
 
 ---
 
-# Giving the right name
+# 给出正确的名字
 
-1. Create the variable with the name of our planet. How would you name such a variable?
-2. Create the variable to store the name of the current visitor. How would you name that variable?
+1. 使用我们的星球的名字创建一个变量。你会怎么命名这个变量？
+2. 创建一个变量来存储当前浏览者的名字。你会怎么命名这个变量？

1-js/02-first-steps/04-variables/3-uppercast-constant/solution.md

@@ -1,5 +1,5 @@
-We generally use upper case for constants that are "hard-coded". Or, in other words, when the value is known prior to execution and directly written into the code.
+我们通常用大写字母表示“硬编码”的常量。或者，换句话说，当值在执行之前被知道并直接写入代码中的时候。
 
-In this code, `birthday` is exactly like that. So we could use the upper case for it.
+在这个代码中 `birthday` 确信是这样的。因此我们可以使用大写。
 
-In contrast, `age` is evaluated in run-time. Today we have one age, a year after we'll have another one. It is constant in a sense that it does not change through the code execution. But it is a bit "less of a constant" than `birthday`, it is calculated, so we should keep the lower case for it.
+在对照组中，`age` 是在运行时计算出的。今天我们有一个年龄，一年以后我们就会有另一个。它在某种意义上不会通过代码的执行而改变。但是相比 `birthday` 它是“少一些常量”的，它是计算出的，因此我们应该使用小写。

1-js/02-first-steps/04-variables/3-uppercast-constant/task.md

@@ -2,23 +2,22 @@ importance: 4
 
 ---
 
-# Uppercase const?
+# 大写的常量？
 
-Examine the following code:
+检查下面的代码：
 
 ```js
 const birthday = '18.04.1982';
 
 const age = someCode(birthday);
 ```
 
-Here we have a constant `birthday` date and the `age` is calculated from `birthday` with the help of some code (it is not provided for shortness, and because details don't matter here).
+这里我们有一个 `birthday` 日期常量和通过一些有用的代码（为了保持简短这里没有提供，并且细节也无关紧要）从 `birthday` 计算出的 `age` 常量。
 
-Would it be right to use upper case for `birthday`? For `age`? Or even for both?
+对于 `birthday` 使用大写方式正确吗？那么 `age` 呢？或者两者？
 
 ```js
-const BIRTHDAY = '18.04.1982'; // make uppercase?
+const BIRTHDAY = '18.04.1982'; // 使用大写？
 
-const AGE = someCode(BIRTHDAY); // make uppercase?
+const AGE = someCode(BIRTHDAY); // 使用大写？
 ```
-