L-11：low-down(bottom-line, truth, bad) 实情
A:Do you know the low-down on this exam?
A:你知道关于这次考试的内幕吗？
B:What do you mean by saying the low-down?
B：你说“内幕”是什么意思？
A:You are still kept in the dark?
A:你还被蒙在鼓里吗？
B:Tell me what on earth is the matter.
B:告诉我到底什么事。
