彼は顧客の要望に応えるために最善を尽くした。
Kare wa kokyaku no youbou ni kotaeru tame ni saizen o tsukushita.
He did his best to meet the client's requests.
国の発展のために、人生の全てを尽くした。
Kuni no hatten no tame ni, jinsei no subete o tsukushita.
He dedicated his whole life to the development of his country.