B 開頭單詞
by compact [交通運輸工程]按照契約
by common consent adv. 大家都同意（公認(rèn)）
by classification 通過分類
by choice adv. 出於選擇
by cheque 用支票
by channel 通過通道 通過頻道 通過渠道
by chance 偶然；意外地
by category 按類別
by car 乘汽車
by cable 用電報發(fā)出；通過電報
by buyer 由買方
by bus 搭乘公共汽車
by boat 乘船
by birth adv. 生來；在血統(tǒng)上
by bike 騎自行車；騎單車
by bicycle 騎腳踏車