Buffalo Soldiers were responsible for cutting the first usable wagon road through Yosemite's Giant Forest of Sequoia trees.

VOA: standard.2009.11.25

So it's the amount of energy, usable energy for the body that a food provides.

所以卡路里是能量的总额,食物所提供的被人体吸收的能量

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

The number-two military man at the Pentagon, General James Cartwright, said it would probably take several more years for Iran to take that highly enriched uranium and develop a usable weapon.

VOA: standard.2010.04.14