button nose [eyes]
だんご鼻[小さく丸い目]
button up [unbutton] one's shirt
シャツのボタンをかける[はずす]
butyric acid
酪酸
buy (yourself) time
時間の余裕を作る
buy ... cheap [at a low price]
…を安く買う
buy ... on account
…をつけで買う
buy [sell] a 10% stake in the business
その企業の株を10%買う[売る]
buy a bicycle with one's savings
貯金で自転車を買う
buy a car outright
車を即金で買う
buy a car secondhand
車を中古で買う