One is black and the other is white.
一方は黒で他方は白
One is often judged by the company one keeps.
人はしばしば付き合う友人によって評価される
One man couldn't lift the box; no, not even half a dozen.
その箱は１人では持ち上げられまい，いや６人でもだめだ
One man's meat is another man's poison.
((諺))甲の薬は乙の毒
One man's meat is another man's poison.
人の好みはさまざまだ；((諺))甲の薬は乙の毒
One may as well be hanged [hung] for a sheep as (for) a lamb.
((諺))子羊を盗んでも絞首刑になるのなら羊を盗んだほうがましだ；毒を食らわば皿まで
one million square [cubic] feet
百万平方［立方］フィート
One more glass won't hurt (you).
((略式))もう一杯いこう
one more time
もう一度
one night
ある晩
One o'clock is good for me.
((特に米))１時が好都合だ
one of his father's colleagues
父の同僚の１人（◆同僚が２人以上の場合に用いる；a colleague of his father'sともいえるが...
One of my hobbies is making model airplanes.
模型飛行機づくりが趣味です
one of my pet hates
私の大嫌いなものの１つ
one of the beauties of living here
ここに住む利点の１つ
One of the officers shone his flashlight into the car.
警官の１人が懐中電灯で車の内部を照らした
one of the oldest scenes stamped on my memory
昔から記憶に残っている光景の１つ
One of the pickpockets informed on his partners to the police.
すりの一味の一人が仲間を警察に密告した
one of the smartest fellows going
当代随一の才人の一人
one of the ugliest buildings in town
町の最も見苦しいビルの１つ
one of the worst floods in [within] living memory
今生きている人々の記憶の中で最悪の洪水の１つ
one of these days
近いうちに
one on top of the other ＝on top of one another
次々と上に重ねて
one or more than one book
１冊か２冊以上の本
one out of many
多数の中から１つ
One pound of wheat takes 25 gallons of water to produce.
小麦１ポンドの生産に２５ガロンの水が必要だ
One school hour lasts 90 minutes.
授業時間は９０分です
One should do such things oneself.
そうしたことは自分ですべきだ
One should never do injury to another person.
他人を不当に扱うべきではない
One small step for a man, one giant leap for mankind.
一人の人間には小さな一歩だが，人類にとっては大きな飛躍である（◆N. Armstrongの言葉）
One swallow does not make a summer.
((諺))ツバメ一羽が来ただけでは夏にならない；早合点は禁物だ
one third [two thirds] of the total
全体の３分の１［３分の２］
One Way
((掲示))一方通行
one way or (the) other
どちらかの方向に；どちらにしても
one way or another
なんとかして
one week shy of one's eleventh birthday
１１歳の誕生日の一週間前に
one's (Sunday) best
((やや古))よそゆきの服
one's ability as a leader
指導者としての才
one's academic background
学歴
one's ancestral acres
先祖伝来の土地
one's appointed lot
宿命
one's arch [main] rival
一番の競争相手
one's aunt by marriage
妻［夫］のおば
one's behavior at meals
食事時の作法
one's beloved daughter
愛娘
one's better self
よい面，良心
one's biggest [largest, best] customer
上得意の客
one's bitter [old] rival
激しく張り合う［かつての］競争相手
one's bottom lip
下唇
one's bounden duty
義務，本分
