43.One cloud is enough to eclipse all the sun. 一葉可障目。
44.One crowded hour of glorious life is worth an age without a name. 光輝生活中忙迫的一個小時抵得上無為的一世。
45.One drop of poison infects the whole tun of wine. 一滴之毒，毒染整桶之酒。
46.One enemy can do more hurt than ten friends can do good. 十個朋友做的好事抵不上一個敵人造成的危害。
47.One enemy is too much. 一個敵人也太多。
48.One false move may lose the game. 一著不慎，滿盤皆輸。
49.One false step will make a great difference. 失之毫釐，謬以千里。
50.One father can support ten children, ten children cannot support one father. 一個父親能扶養十個孩子，十個孩子卻不能贍養一個父親。
51.One father is more than a hundred schoolmasters. 一個父親勝於一百個教師。
52.One flower makes no garland. 一木不能成林。
53.One foe is too many; and a hundred friends too few. 朋友成百猶覺少，仇敵一人已嫌多。
54.One fool makes many. 一人傻，傻大家。
55.One foot is better than two crutches. 一隻腳勝過兩根枴杖。
56.One good head is better than a hundred strong hands. 上百雙有力的手，不如一個聰明的頭腦。
57.One good mother is worth a hundred schoolmasters. 一個好的母親頂得上一百個教師。
58.One good turn deserves another. 以德報德。
59.One half of the world does not know how the other half lives. 貧富不相知。
60.One has lived too near a wood to be frightened by owls. 深知底蘊，不以為怪。
61.One honest word is better than two oaths. 兩句誓言不如一句實話。
62.One hour's sleep before midnight is worth three after. 午夜前睡一小時抵得上午夜後睡三小時。
63.One hour today is worth two tomorrow. 今天的一個小時抵得上明天的兩個小時。
64.One love drives out another. 新愛逐舊歡。
65.One man makes a chair and another man sits in it. 坐享其成。
66.One man may steal a horse while another may not look over a hedge. 只許州官放火，不許百姓點燈。
67.One man's meat is another man's poison. 一個人的佳餚常為另一人的毒藥。
68.One may sooner fall than rise. 跌倒容易爬起難。
69.One may think that dares not speak. 人可思其不敢言者。
70.One misfortune comes on the neck of another. 禍不單行。
71.One must draw the line somewhere. 人之所為，總有限度。
72.One must drink as one brews. 自作自受。
73.One must howl with the wolves. 入鄉隨俗。
74.One never loses anything by politeness. 有禮貌對自己不會吃虧。
75.One never loses by doing a good turn. 行善者決無一失。
76.One penny witgh right is better than a thousand without right. 合法得來一個錢，勝過非法錢一千。
77.One ploughs, another sow; who will reap no one knows. 有的耕，有的播，誰來收穫很難說。
78.One rotten apple spoils the whole barrel. 一隻爛蘋果爛一蘿蘋果。
79.One should eat to live, not live to eat. 人為生而食，非為食而生。
80.One sin opens the door for another. 一個罪惡常為另一個罪惡開門。
81.One's mantle falls on somebody. 春風化雨。
82.One sows another reaps. 不勞而獲。
83.One swallow does not make a summer. 一燕不成夏。
84.One thorn of experience is worth a whole wilderness of warning. 一次痛苦的經驗抵得上千百次的告誡。 liuxuepaper.com