They went to one man's home but could not find him there.

VOA: special.2009.09.07

If you look really carefully, you could find it was not a single line but two lines, and Bohr is silent on such matters.

如果你仔细观察的话，会发现这是两条谱线而非一条，对这一研究，波尔不得不沉默。

麻省理工公开课 - 固态化学导论课程节选

His family was poor. His early education came not from school teachers, but from whatever books he could find.

VOA: special.2009.04.09

She said Ian Shaw was among several people who could not find paying jobs but still wanted to work.

VOA: special.2009.04.03

But he did not find that special water, or any other water that people could drink.

VOA: special.2010.03.22