at the end of.在...末端(到...尽头)
1.It’s at the end of the street.
在这条街的尽头.
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2.A：Left at the end of the ramp?
在坡道尽头向左转?
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3.B:At the end of this corridor.
在这条走廊的尽头处.
by the end of到...时为止,在...之前
1.Let me know by the end of the week.
这个周末前给我回音.
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2.By the end of this year we'll have.
到今年年底,我们就能攒够5万元了.
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3.By the end of next month.
下个月底.