名詞 trial and error:

1. experimenting until a solution is found

形容詞 trial and error:

1. trying out various means or theories until error is satisfactorily reduced or eliminated
   同義詞：trial-and-error
2. relating to solving problems by experience rather than theory
   同義詞：trial-and-error

1. The only way Jim could solve the algebra problem was by the method of trial and error.
   要解決這道代數(shù)題，吉姆唯一能做的就是不怕失敗，反復嘗試。
2. I lost the instruction book and so I had to find out how to use the machine by trial and error.
   我把說明書丟失了，結(jié)果只得通過不斷摸索才弄懂怎樣使用這部機器。
3. He learned technical skills by trial and error.
   他通過不斷摸索掌握技能。
4. I finally found the right key after lots of trial and error.
   經(jīng)過反復試驗，我終于找到了正確的方法。