by law
法により
by [on] lease
賃貸借契約で
by mail＝through the mail
郵便で
by mail order
通信販売で
by main force
こん身の力をふりしぼって
by means of ...
((形式))…を用いて，…によって
by misadventure
運悪く
by mischance
不運にも
by mistake
誤って
by mistake
間違って
by mixture
混ぜ合わせて
by monorail
モノレールで
by moonlight
月の明かりで
by mutual consent [agreement]
合意の上で
By my reckoning it's 20%.
ざっと２割だ
by natural consequences
自然の成り行きで
by no stretch [not by any stretch] of the imagination
いかに想像をたくましくしてみても…ではない
by occasion of illness
病気のために
by one's bootlaces
（敵に対し）１人で向かって
by [on] one's faith
誓って，確かに
by [on] one's own admission
自ら認めるように
by parcels
少しずつ
by parol
口頭で
by piecemeal
少しずつ
by [for] preference
好んで
by proxy
代理で
by radio
無線で
by railroad
鉄道で
by reason of age
年齢を理由に
by referendum
国民投票で
by request
要求［依頼］によって
by road
陸路で
by sacrifice of economic benefit in the future
将来の経済的利益を犠牲にして
by satellite relay
衛星中継で
by separate mail
別便にて
by sheer [a curious] coincidence
まったくの［不思議な］偶然の一致で
by simple declaration
単に宣言するだけで
by single [postal] ballot
単記無記名［郵便］投票で
by some calculations
ある計算では
by some fortuity
何かの偶然で
by some freak of fate [fortune, chance]
偶然のいたずらで
by [on] special [kind] permission of ...
…の特別の［寛大な］計らいで
by spells
交替で
by statute
法令によって
by stealth
人目を忍んで，こっそりと
by succession
世襲で
by suggestion
連想によって
by telegraph
電報で
by [with] the blessing of God
神のみ恵みによって
by the dozen [hour]
ダース［時間］単位で
