Update zh_CN.lang

The previous guy has fixed many translations. 
Unfortunately, there are still a few inappropriate translations remaining to be fixed. 
For instance, biome is translated into "生态群系“, which I have never heard of :p
In addition, there is a translation guide in Chinese Minecraft Wiki:
http://minecraft-zh.gamepedia.com/Minecraft_Wiki:译名标准化
Although it's a guide for Vanilla Minecraft translation, I think we should strictly follow the guide for the translations of word also appeared in Vanilla