K-6:keep/hold at bay 穷途末路
A:Couldn't you put off the deadline till next month?
A:您不能把期限宽限到下个月吗?
B:I'm afraid not.
B:恐怕不能。
A:I'm really held at bay.
A:我实在是走投无路了。
B:I can't help.
B:我也无能为力。