This time,with his budget under fire from the political opposition, the president is fighting back.

VOA: standard.2009.03.17

It's collecting information from all these dendrites under the right series of signals the cell body integrates all that information, says time for me to fire an action potential.

神经收集所有树突送来的,通过一系列正确信号传来的信息,细胞体整合所有信息之后,就到了发出动作电位的时候了

耶鲁公开课 - 生物医学工程探索课程节选

The next day, they realized that the sand and natron under the fire had melted then cooled into glass.

VOA: special.2009.09.16

There are conflicting accounts of what happened. The Israeli army says its troops came under sniper fire during a routine operation on Israel's side of the frontier.

VOA: standard.2010.08.03

Dan La Pierre acknowledges Natural Fire 10 has come under scrutiny.

VOA: standard.2009.10.20

For instance,he says, a UN compound recently was hit by rocket fire, a World Food Program convoy came under attack and non-governmental organizations are frequent victims of armed robbery by criminals.

VOA: standard.2009.08.07