drained是什么意思介绍如下：
英/dreɪnd/。美/dreɪnd/。
adj.
精疲力竭;无精打采。
v.
排空;(使)流光;放干;(使)流走，流出;喝光;喝干。
drain的过去分词和过去式。
She suddenly felt totally drained.
她突然感到精疲力竭。
Working such long hours had drained him.
长时间的工作使他精疲力竭。
We had to drain the oil out of the engine.
我们必须把发动机里的机油全部放掉。
She pulled out the plug and let the water drain away.
她拔起塞子放掉了水。
She pulled out the plug and the water drained away.
她拔掉塞子，让水流走了。
You will need to drain the central heating system before you replace the radiator.
你得先把中央供暖系统的水排净再更换散热器。
