If some of them would only make major advances to a lesser problem --- like eliminating dandruff , say --- they might in fact make more people happier more of the time !

如果他们中的一些人仅在较轻微的问题上取得了重大进展比如，消灭了头皮屑他们也许实际上会带给更多人更持久的快乐。

It 's like having dandruff in your stomach .

就好象是胃里长了头屑。

Dandruff makes mr. lee scratch his head all the time .

头皮痒使李先生常常抓头。

Dandruff is a common problem .

头皮屑是一种常见的问题。

Dandruff causes permanent hair loss .

头皮屑导致永久性脱发。