不遗余力 /bùyíyúlì/ angolul

go all out▼(put forth all possible effort)
verb
[UK: ɡəʊ ɔːl ˈaʊt] [US: ˈɡoʊ ɔːl ˈaʊt]

go to great lengths▼(make a major effort)
verb

spare no effort▼(do everything within one's powers to achieve something)
verb
[UK: speə(r) nəʊ ˈe.fət] [US: ˈsper ˈnoʊ ˈe.fərt]