field [catch] a ball on the first bounce
ワンバウンドで捕球する
field study
現地調査
fierce envy [competition]
激しい羨望せんぼう［競争］
Fifth Avenue
５番街（◆theはつけない）
Fifty ayes were cast and only five noes.
賛成５０に対して反対はたった５だった
Fifty dollars is the best I can offer you.
５０ドルが出せる限度です
Fifty thousand fans were packed into [in] the stadium.
５万人のファンで競技場はいっぱいだった
Fifty tons of crude oil spilled into the ocean.
海に原油が５０トン流出した
fight a duel with a person
人と決闘する
fight a fair battle with the enemy
敵と正々堂々と戦う
