英语词汇be on the ball怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	be on the ball
释义	be on the ball [俚语] 变机警；机灵能干；活跃；准备应急；提高警惕，警觉专心做事；知情，内行，能胜任；积极能干，有能力，擅长于；精力充沛
随便看	travel(l)ing clock travelling clocks travelling crane travelling detector travelling dune travelling fellow travelling fellowship travelling gantry crane travelling grate stoker travel(l)ing library travellings travel(l)ing salesman travelling salesman problem travelling valve travel(l)ing wave travelling-wave amplifier travelling-wave antenna travelling-wave magnetron travelling-wave maser travelling-wave phototube travel(l)ing-wave tube travelling-wave tubes travelogue traveloguer travelogues

英汉双解词典包含483723条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。