Reduce waste by bringing food and drinks for the trip in re-usable containers.

VOA: special.2009.06.19

So we now have a real usable criterion to help guide our understanding of whether things happen by themselves of their own accord or not.

所以我们找到了一个非常有用的判据,这个判据能够指导我们,弄明白变化是否,是自发发生的。

麻省理工公开课 - 热力学与动力学课程节选

stem cell researchers have found a way to get perfectly usable stem cells from fully grown human beings.

干细胞研究者已经找到了一种方法，
可以从成年人身上获取可用的干细胞。

干细胞和伦理 - SpeakingMax英语口语达人

This makes it less usable in poor communities.

VOA: special.2010.06.30

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

"This is the world's first commercially available pedal generator, allowing to convert your human power into usable electricity.

VOA: standard.2010.02.24

So if you were starving and you really needed energy, that is your body needed calories, it needed usable energy in order to survive, the broccoli's not going to do you much good and the brownie would be terrific.

假如你快饿死了,实在需要能量,那是你的身体需要卡路里,身体需要可利用的能量去支撑,花椰菜这时就没多大帮助了,布朗尼蛋糕才是首选

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

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

VOA: standard.2009.11.25

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