The driver told me he was once robbed at knifepoint by a hitchhiker.

这位司机告诉我，他曾经被一位搭车者持刀抢劫过。

Every few days, young thugs steal her paltry takings at knifepoint.

每隔几天，一些小流氓用刀威迫她交出其微乎其微的钱财。

A 77-year-old woman was robbed at knifepoint.

【rob】一名 77 岁老妪遭到持刀抢劫。

She was robbed at knifepoint.  She’s fine but it was scary.

她被用刀逼着抢劫的。 她还好但怕。

Stomach churning, I feel my lungs threaten to hyperventilate as panic seizes me at knifepoint.

胃部翻腾，我感到肺部濒临过度换气的边缘，恐慌如利刃般紧逼，令我几乎窒息。