Or the crystals, which are sharp, needle-like structures, poke their way through the cap covering the cholesterol deposit, like nails through wood.

或者针状结构的尖锐晶体像钉子刺穿木头那样，刺穿‘帽子’样的胆固醇沉积物。

youdao

"This needle is still sharp enough to penetrate through body tissue.

VOA: special.2010.02.10

"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

Scientists used the microscope to control a tiny, super-sharp needle along a copper surface, IBM said.

WSJ: IBM makes tiny movie by pushing molecules around

Highly polished beveled edges reflect light in two directions for better legibility and emphasize needle-sharp tips, lending an air of Germanic precision.

FORBES: The Face of Time