瑪麗是一個認真的工人英文怎麼說？

Mary is an earnest worker.

她半開玩笑半認真地說英文怎麼說？

She spoke half in sport, half in earnest.

她工作很認真英文怎麼說？

She is earnest in her work.

我不是開玩笑;我是認真的英文怎麼說？

I'm not joking; I'm in earnest.

潔美努力認真地學法文，不過卻沒什麼進步。 這句話的英文怎麼說？ (學習英語會話)

Jamie tried in earnest to learn French, but she made little progress.