呕心沥血

呕心沥血 [ǒu xīn lì xuè]

1. ■ make painstaking efforts; make every effort to [do one's best to] achieve perfection; shed one's heart blood; spare no pains; strain one's heart and mind; take infinite pains; throw all one's energy into; through painstaking effort; work one's heart out; work indefatigably; work with might and main