wèi / le / ràng / qīng / máng / niú / yě / néng / kàn / dǒng / tōng / zhī / gōng / zuò / rén / yuán / niàn / gěi / tā / men / tīng

为了让青盲牛也能看懂通知，工作人员念给他们听。

So that illiterate people can also understand the notice, the staff read it to them.