false start -------- 失败的开端（非正式）

英文释义
(INFORMAL) A wrong beginning; a temporary failure in starting to do something.

例句
I had to write a speech last night, and after several false starts, I finally found exactly the right words to express what I wanted to say.
我昨晚必须要写一篇演讲稿，开头写了好几回都没写好，最终，我找到了恰当的词语来表达我想说的内容。