nerve,神经，rack,折磨。引申词义十分紧张的。

1. Nerve cells have limited ability to regenerate if destroyed.

如果受到损伤，神经细胞再造的能力有限。

来自柯林斯例句

2. The mere mention of John had touched a very raw nerve indeed.

提到约翰就真的让人心痛。

来自柯林斯例句

3. He had the nerve to ask me to prove who I was.

他竟敢要求我证明我自己的身份。

来自柯林斯例句

4. The brandy made him choke, but it restored his nerve.

虽说白兰地呛了他一下，却让他恢复了勇气。

来自柯林斯例句

5. Malcolm worked up the nerve to ask Grandma Rose for some help.

马尔科姆鼓起勇气请罗丝奶奶帮点忙。

来自柯林斯例句