n.敏锐...

keenness的音标：...

This hard work has drained away my keenness.这种艰苦的工作削弱了我的锐气.Mischievous little beggars they are, both of them, but talk about keenness!这俩小家伙淘得要命, 可显起积极呀, 嘿!A few weeks'hsrd work should damp down his keenness.几星期的艰苦工作...