by desperate means; do all (/everything) one can; do everything within one’s power; do one’s utmost (/best);(do sth) tooth and nail; exert every (/the utmost) effort; exert oneself to the utmost; give full vent to one’s capacity;go all out; go to great (/all) lengths; leave no stone unturned; make (/use)every endeavour; move heaven and earth; not cease one’s efforts; not stint one’s effort;spare no effort (/energy/pains); to the best of one’s effort (/ability/power); with all one’s might (and main); with both hands/……然而在它一切力所能及的地區(qū)，它將～地鎮(zhèn)壓中國(guó)的反抗，……(《毛澤東選集》477)…but she will spare no effort to suppress China’s resistance in all the areas she can reach，…
不遺余力
spare no efforts;go all out;do one’s level best
不遺余力bù yí yú lì
遺：留下。把所有的力量全部使出來(lái)。do one’s utmost, spare no efforts, do one’s best, go all out,spare no pains, by desperate means, do all one can