If the Union force attacked before Stonewall Jackson got into position, Lee could not possibly hold it back.

VOA: special.2009.10.15

Whenever there is a force, it can be traced back to a tangible material cause, which is all the time a force of contact, with the exception of gravity.

如果有作用力,那它一定能找到一个明确的实体施力物体,也就是无论何时物体受的都是接触力,引力除外

耶鲁公开课 - 基础物理课程节选

That puts great force on the back of the foot.

VOA: special.2010.02.03

Arthur Conan Doyle,creator of the fictional detective Sherlock Holmes, wrote about Poe's influence on other crime writers: "Each may find some little development of his own, but his main art must trace back to those admirable stories of Monsieur Dupin,so wonderful in their masterful force, their reticence,their quick dramatic point."

VOA: special.2009.02.02

When asked whether the Congressional Budget Office deficit projections will force Democrats to scale back these and other goals, Pelosi responded.

VOA: standard.2009.03.24

Others claim union officials have used violence and other intimidation tactics to force them back to work.

VOA: standard.2010.06.24

Fortier says that might force Democratic congressional leaders to pull back a bit on their reform plans when they come back to work next month.

VOA: standard.2009.08.12

Back on the ground, the observations are sent to a task force tracking the spill.

VOA: standard.2010.07.05

"Since the European Union Naval Force arrived in the Gulf of Aden and Somali Basin in the Indian Ocean back in December 2008, this is the farthest hijacking that we're aware of.

VOA: standard.2010.04.20