老人拄着拐杖走路时，双腿是最不稳的。

The elderly man's legs were the ___shakiest when he walked with his cane.

他在演讲的前五分钟表现得最不自信。

His ___shakiest moments came during the first five minutes of the speech.

这份报告中最不可靠的部分是那些没有数据支持的结论。

The ___shakiest section of the report is the conclusions without any data backing.