努力的英语高级表达有以下几种：1. strive：表示努力、奋斗、抗争，例如"They strive for excellence in their products."。2. endeavor：表示努力、尽力，例如"We are working hard to achieve our sales target."。3. make great efforts：表示付出巨大的努力，例如"She is making efforts to improve her English skills."。4. devote oneself to：表示全力以赴，例如"They devote themselves to developing new products."。5. go all out：表示全力以赴，例如"We will go all out to win this contract."。6. assiduously：表示孜孜不倦，例如"He assiduously pursues his career goals."。7. untiringly：表示不知疲倦地奋斗，例如"She untiringly promotes the company's products."。8. make every effort to do：表示努力去做某事，例如"I will make every effort to realize my dream."。9. struggle for：表示奋斗、努力争取，例如"He always struggles for a better life."。
