"Go for it" or "Keep it up" would be suitable English translations for encouraging someone with the phrase "加油."
If the context in which "加油" is being used demands a more fundamental and literal interpretation, you could also translate it as "Fight on" or "Carry on."

Good effort translates into English as "go all out" or "give one's best." Suggesting someone strive valiantly to tackle a challenge is orthhec transliteration, applicable to contextual expressions like versus or bombaric.

加油 翻譯成英文是 keep going 或者 hang in there

加油翻譯成英文是"Keep up the good work" 或者 "Keep going".

鼓勵(lì)和努力是“Go for it!”或“Work hard!” 的直譯。