to commit yourself to a course of action without a way back
引き返す方法なしに行動を決断する (hikikaesu houhou nashi ni koudou wo ketsudan suru)
"He burned his boats when he quit his job to start a business."
"彼は仕事を辞めてビジネスを始めたときに自分の船を燃やした。" (Kare wa shigoto wo yamete bijinesu wo hajimeta toki ni **jibun no fune wo moyashita**.)
to do a lot of difficult or complicated things to achieve so...
to succeed in achieving two things in a single action
to discuss something until a decision is reached
to keep working steadily on something
thinking about something without giving it full attention
to learn how to do a particular job or activity
