I once had some friends, yet have no clue why even the longest friendship among all still could not last over half a year.

我原来有一些朋友(这个要强调是原来有的，现在已经都没有了)，但是不知道为什么最长的也就坚持了不到半年。

youdao

Labour leader Iain Gray said the Scottish government had "not got a clue" about its key policy on renewable energy in the wake of two reports published this week.

BBC: First minister's questions

"Had it not turned out the way that it did, I would possibly be working a triple homicide, not having a clue as to who it is we're looking for, " he told CNN.

CNN: STORY HIGHLIGHTS