航海专业英汉词典
航海专业英汉词典：第147页
at one's convenience
at one's disposal
at one's expense
at one's leisure
at one's own choice
at one's own risk
at one's right hand
at opposite ends
at ordinary pressure
at other times
at our command
at our cost
at our doorstep
at our fingertips
at our need
at our own choice
at our own risk
at our peril
at our request
at our service
at our wit's end
at owner's risk
at par
at peace
at presence of
at press
at prime tense
at quiet
at ramdom
at ready
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