chore(i8n,learn): processed translations (#41364)

Co-authored-by: Crowdin Bot <support+bot@crowdin.com>

curriculum/challenges/chinese/02-javascript-algorithms-and-data-structures/basic-javascript/declare-javascript-variables.md

@@ -49,7 +49,9 @@ if(typeof myName !== "undefined"){(function(v){return v;})(myName);}
 ```
 
 ## --seed-contents--
+
 ```js
+
 ```
 
 # --solutions--

curriculum/challenges/chinese/02-javascript-algorithms-and-data-structures/basic-javascript/initializing-variables-with-the-assignment-operator.md

@@ -36,7 +36,9 @@ if(typeof a !== 'undefined') {(function(a){return "a = " + a;})(a);} else { (fun
 ```
 
 ## --seed-contents--
+
 ```js
+
 ```
 
 # --solutions--

curriculum/challenges/chinese/02-javascript-algorithms-and-data-structures/basic-javascript/multiply-two-decimals-with-javascript.md

@@ -1,6 +1,6 @@
 ---
 id: bd7993c9c69feddfaeb7bdef
-title: Multiply Two Decimals with JavaScript
+title: 两个小数相乘
 challengeType: 1
 videoUrl: 'https://scrimba.com/c/ce2GeHq'
 forumTopicId: 301173
@@ -9,23 +9,23 @@ dashedName: multiply-two-decimals-with-javascript
 
 # --description--
 
-In JavaScript, you can also perform calculations with decimal numbers, just like whole numbers.
+在 JavaScript 中，你也可以用小数进行计算，就像整数一样。
 
-Let's multiply two decimals together to get their product.
+把两个小数相乘，并得到它们乘积。
 
 # --instructions--
 
-Change the `0.0` so that product will equal `5.0`.
+改变 `0.0` 的数值让变量 product 的值等于 `5.0`。
 
 # --hints--
 
-The variable `product` should equal `5.0`.
+变量 `product` 应该等于 `5.0`。
 
 ```js
 assert(product === 5.0);
 ```
 
-You should use the `*` operator
+要使用`*`运算符。
 
 ```js
 assert(/\*/.test(code));