The child was as sharp as a needle and soon began to use different words.

这孩子非常聪明， 很快就开始运用不同的的词汇了。

youdao

Young though he was, the child was as sharp as a needle and sensed the disharmony between his parents.

虽然这孩子还小，但很聪明，他觉察到他父母之间不和谐。

youdao

As well as needle-sharp claws, the undersides of the feet are covered with short, spine-like scales, which ensure a firm grasp.

同样它也是锋利的鹰爪，在鹰爪的下面有一个短而象倒刺一样的脚掌，以确保紧紧地抓住猎物。

youdao

"A needle that goes through the skin needs to be as sharp as possible because that's going to be associated with the easiest access, the more slick closure, and the less pain when somebody has, say their blood drawn or their skin closed."

VOA: special.2010.02.10