是我

it is me.

努力

effort; endeavor; hard work; exertion; attempt; toil; diligence; striving; sweat; strive; try; struggle; try hard; work hard; strive to; exert oneself; make an effort; make great efforts; hard; diligent; hardworking; concerted; industrious; assiduous; diligently; strenuously; assiduously; with effort

动力

motivation; power; motive power; propulsion; drive; impetus; momentum; driving force; motive force; engine power; thrust; energy; power-driven; motorized; powered; dynamic; motive