tā / shuō de / xū tóu bā nǎo / bàn tiān / yě / méi / jiǎng qīng chu / xiàng mù / dào dǐ / yào / jiě jué / shén me / wèn tí

他说得虚头巴脑，半天也没讲清楚项目到底要解决什么问题。

He spoke in a vague and insubstantial way and still had not explained what problem the project was supposed to solve.