That has got five claws; but it doesn't scratch me.

这玩意儿有五个爪子，但是它抓不到我。

youdao

youdao

But researchers have been hunting itch-specific receptors in hopes of eventually learning how to block their "scratch-me" signals to the brain and help relieve at least some types of itch.

但是研究人员正在寻找瘙痒特定受体，期望最终能掌握如何阻止“挠挠我”信号传到大脑并帮助缓解某些类型的瘙痒。

youdao

Hearing the blundering repetitions of someone learning something from scratch was unbearable to me.

NEWYORKER: Mr. Bones

Treblinka became real, the shift from myth to reality took place in a blinding flash, the encounter between a name and a place wiped out everything I had learned, forced me to start again from scratch.

NEWYORKER: Witness

The voters you need to worry about are independents like me, who are working three jobs to scratch out 35 grand a year.

FORBES: Is Obama About to Demagogue the U.S. Into Default?