After three strikeouts in starting businesses, he decided to gain more experience first.

strikeouts 是名词 strikeout 的复数形式。strikeout 由动词短语 strike out（意为"失败、出局"）转化而来，原指棒球比赛中"三振出局"。 在商业语境中，strikeout 引申为"失败、挫折"的意思，特别指创业或商业尝试的失败。