When the front bird moves its wings up and down, the resulting force of the air lifts the next one.

当前面的鸟上下移动它的翅膀时，产生的空气力会带动下一只鸟。

youdao

Last year, mornings were like a fight because I had to force Tasha to hurry up when she was preparing for school.

去年，当塔莎准备上学时，我不得不强迫她加快速度，所以早晨就像一场战斗。

youdao

The government decided against using force to break up the demonstrations.

政府决定不使用武力来驱散示威游行。

《柯林斯英汉双解大词典》

Then,on April twenty-fifth, General Taylor received word that a large Mexican force had crossed the border a few kilometers up the river.

VOA: special.2009.02.26

You add them all up algebraically, keeping track of their sign, and that's the total force.

你再对这些力做代数加法,注意符号,就求出合力了

耶鲁公开课 - 基础物理课程节选

You know, one famous tactic is--if you have an infantry force coming forward, you send tanks in it to break up the line of the infantry, so that you can defeat the infantry in that way.

最有名的战术是,如果有敌方步兵逼近,你把坦克派过去,破坏他们的步兵阵型,以这种策略对付步兵

耶鲁公开课 - 古希腊历史简介课程节选

They would do well to see themselves as a bottom up force for reform that targets the political middle and works outward, rather than launching a broadside from the right.

FORBES: Once Effective, The Tea Party Has Become Toxic

We cannot make an announcement or snap our fingers to change the situation overnight in Libya, to force the regime to give up power, to force Colonel Qaddafi to give up power.

WHITEHOUSE: Press Briefing

The recent warnings on recruiting and readiness may mean we are beginning to use up the force.

CENTERFORSECURITYPOLICY: Freedom Flame 2013