外行指导外行的英文：
the blind leading the blind
n. 盲人，窗帘，托词
v. 使变瞎，使思维混沌
adj. 瞎的；失明的，盲目接受的，不能自制的，无理性的
A blind driveway.
隐蔽的车道
If the blind lead the blind, both shall fall into the ditch.
盲人领盲人，双双跌人沟。
The very limit of human blindness is to glory in being blind.
人类盲目性的最根本局限就在于其对盲目性感到荣耀。
We are all blind to our own choice blindness.
其实人人都有选择盲区。
Light filtered through the blinds.
光线透过了帘子。
n. 领导，疏导，铅板 adj. 主要的，重要的
Will you take the lead?
你领个头好吗？
Lead poisoning( or plumbism )：Poisoning by accumulation of lead in the body.
铅中毒:铅在体内积累引起的中毒。
The road leads direct there.
这条路直接通那儿。
The dog is straining at its lead.
那条狗正使劲地拖拽皮带。
Put the dog on the lead!
用皮带牵住狗！