This winter air is keen and cold, And keen and cold this winter sun, But round my chair the children run Like little things of dancing gold.英文原著 · 《Charmides and Other》
On the fourth morning he rode anxiously up the valley, fearing that the horses had been stolen in the night, yet hoping they had merely strayed up the creek to find fresh pastures. A light breeze that carried the keen edge of frost made his nose tingle. His horse trotted steadily forward, as keen on the trail as Buddy himself; keener, for he would be sure to give warning of danger. So they rounded a bend in the creek and came upon the scattered fringe of the remuda cropping steadily at the meadow grass there.英文原著 · 《Cow-Country》
(Breaking out into a keen.) But who'll pity Deirdre has lost the lips of Naisi from her neck and from her cheek for ever? Who'll pity Deirdre has lost the twilight in the woods with Naisi, when beech-trees were silver and copper, and ash-trees were fine gold? CONCHUBOR -- bewildered. -- It's I'll know the way to pity and care you, and I with a share of troubles has me thinking this night it would be a good bargain if it was I was in the grave, and Deirdre crying over me, and it was Naisi who was old and desolate. [Keen heard.英文原著 · 《Deirdre of the Sorrows》
"Our king, his broad shield disregarding, More keen for striking than for warding, Now tells his lads their spears to throw, -- Now shows them where to strike a blow. From fleet to fleet so short the way, That stones and arrows have full play; And from the keen sword dropped the blood Of short-lived seamen in the flood."英文原著 · 《Heimskringla》
Depending upon his keen observation and sense of location he felt safe in assuming that he could reach the palace grounds by means of the subterranean corridors and chambers of the temple through which he had been conducted the day before, nor any slightest detail of which had escaped his keen eyes. That would be better, he reasoned, than crossing the open grounds above where his pursuers would naturally immediately follow him from the temple and quickly discover him.英文原著 · 《Tarzan the Terrible》
"Grotesque enough, but I rather wish they had let him go the whole hog and blaze away. He was as keen as knives to show us how he could take care of his purple diamonds; and, do you know, Bunny, _I_ was as keen as knives to see."英文原著 · 《The Amateur Cracksman》