alert;sharp-witted;vigilant;as sharp as a razor;canniness ;

A canny bureaucratic infighter , Moorer made no pretense of academic subtlety.
穆勒是个机警的官场角逐者, 但他并不装作高深莫测.
来源:词典精选例句These wild horses, swift and alert, roam where they please, led by a few sleek steeds.
它们由几匹最膘壮的公野马领群, 机警善跑, 游走无定,夜间混入牧群.
来源:汉英文学 - 现代散文" They are mighty particular about visitors and -- " He stopped and peered into her face sharply.
" 这里对于探监规定可严格呢,而且 ---- " 他说到这时便打住了,一面机警地注视着思嘉.
来源:飘(部分)Turning quickly she frequently caught him watching her, an alert, eager, waiting look in his eyes.
她突然一转身,常常发现他在看她, 眼中流露出机警.殷切与等待的神情.
来源:飘(部分)Alertness, calmness, courage : he could see them all in the youngster's face.
机警, 镇定, 胆量,都摆出在这年青人的脸上.
来源:子夜部分
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