大约在三天前。
You see I bought this personal stereo at your shop three days ago, and I'm afraid it hasn't really matched up to what I was told about it.
你看，我三天前在你们店里买了这台立体声音响，但它恐怕和你告诉我的不太一样。
He told me about it three days ago, namely Friday.
他三天前告诉我这件事，也就是周五。
He told me about it three days ago, namely Friday.
他三天前告诉我这件事，也就是周五。
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