Mashable:

A bunch of mathematics PhD holders recently experienced a humbling moment after a prodigy stepped in to almost effortlessly solve a problem that they'd been struggling with for months.

生词短语：

humbling

使谦逊的

prodigy

(年轻的)天才，奇才

step in

干预，插手（棘手问题）

effortlessly

毫不费力地