1.   Boxing was the inspiration for his own writing, they said, as well as the spiritual metaphor he used to understand his life.

2.   It is used to understand everything from the turbulent interior of the sun to designing jet engines.

3.   Political science professor John Pritney at Claremont McKenna College said he wishes he could get the documents that lawmakers use to understand the legalese of legislation.

4.   The field trip is the context they use to understand whole numbers.

5.   They say their research refutes the old notion that skin color differences can be used to understand evolutionary relationships among human populations living in different places on Earth.

6.   You will need one, if only to understand how he uses Stabreim, an archaic German alliterative device, as a major element in his prosody.