检察官难以将被告的行为与所谓的欺诈联系起来。

The prosecutor struggled to ___connect the defendant's actions to the alleged fraud.

真正的幸福通常与有意义的关系相关，而非物质财富。

True happiness is often ___connected with meaningful relationships rather than material possessions.

研究人员已成功将这种基因突变与心脏病风险增加联系起来。

Researchers have successfully ___connected the genetic mutation to an increased risk of heart disease.