不遺余力
Leave no avenue unexplored.
Leave no stone unturned.
Go to all lengths.
Tooth and nail.
Move heaven and earth.
eg:He will support you for all he is worth.
中英俚語俗語來源:戰(zhàn)國策:“王曰,秦之攻我也,不遺余力矣,必以倦而歸也。”
同義詞:全力以赴 At full steam.
反義詞:袖手旁觀 Stand by with folded arms.