translate power pins to zh

src/zh/translate/5v-power.md

@@ -9,8 +9,8 @@ pin:
   '2':
   '4':
 -->
-# 5v Power
+# 5v 供电
 
-The 5v power pins are connected directly to the Pi's power input and will capably provide the full supply current of your mains adaptor, minus that used by the Pi itself.
+5v 供电引脚直接接在树莓派的电源输入上，除去 Pi 自身消耗的电流外，该引脚可以提供电源适配器提供的全部电流。
 
-With a decent power supply, such as the official Pi adaptor, you can expect to pull about 1.5A. This varies by Pi model and adapter used. Devices that require a high current- such as LED panels, long LED strips or motors- should use an external power supply.
+如果电源适配器合格的话（比如树莓派官方电源适配器），该引脚可以输出 1.5A 左右的电流。不同的树莓派版本或者电源适配器能输出的电流也会不同。需要消耗大电流的器件，比如 LED 面板、大功率 LED 发光条、或者电机等，应该外接电源，不要用树莓派供电。

src/zh/translate/ground.md

@@ -15,13 +15,10 @@ pin:
   '34':
   '39':
 -->
-# Ground
+# 地线
 
-The Ground pins on the Raspberry Pi are all electrically connected, so it doesn't matter
-which one you use if you're wiring up a voltage supply.
+树莓派上所有地线引脚在电路上都是连在一起的，所以如果想供电的话，无论哪一根引脚都是一样的。
 
-Generally the one that's most convenient or closest to the rest of your connections is tidier
-and easier, or alternatively the one closest to the supply pin that you use.
+通常情况下，插线的时候怎么方便怎么来，选择最靠近其他接线的地线引脚即可，或者选择最靠近供电引脚的地线。
 
-For example, it's a good idea to use Physical Pin 17 for 3v3 and Physical Pin 25 for ground when using
-the SPI connections, as these are right next to the important pins for SPI0.
+比如，在进行 SPI 通讯时，使用物理引脚 17 和 25 进行 3v3 供电是最好不过的，因为这两个引脚最靠近 SPI0 的引脚。