there is something wrong with my bike .I must have it repaired.

问题描述:

there is something wrong with my bike .I must have it repaired.
为什么后半句,不能翻译成我必须修理一下它..

因为这里是【请别人来帮自己修】,不是自己修理;
固定句型:have sth done:请别人做某事;某事被别人做,