So if this distance, a if this radius is a then the magnitude of F will just be a.
所以的话，如果这半径是a，那么F的值就是。
So of course a then flows through this, what's called a semi-permeable membrane.
那么当然A会流过这个，这个被称为半透膜。
Being relatively small, the screen had a resolution of a then-unheard-of 200 pixels per inch (ppi).
一款相对较小的显示器，它拥有一个前所未闻的每英寸200像素的显示屏。
In his first full season as head coach, Ray Scott guided the Pistons to a then-franchise-best 52-30 record.
在他作为主教练的第一个完整赛季，雷·斯科特带领活塞队创纪录地取得了52胜30负的成绩。
It follows a very similar incident in April 2010 when a then-unreleased iPhone4 was left in a beer garden of a German bar in California by an Apple engineer.
2010年4月，苹果的一名工程师将一部还未上市iPhone4丢在了加州一家德国酒吧的露天啤酒店里，而这次iPhone5又经历了相同的遭遇。
A video released by the FBI Monday shows a then 24-year-old St. Louis man shining a laser at a police helicopter last year — and cops arresting him minutes later.
FBI周一的时候发布了一个去年当时24岁的圣路易斯人用激光幌射警用直升机的录像，几分钟后这人就被警方逮捕了。
The number of asylum-seekers in South Africa reached a then record high in 2008, when more than 200,000 applications were received by the Home Affairs Department -- more than any country in the world.
08年，到南非来寻找庇护所的外来人口达到了历史新高，当时有超过200，000人向南非民政事务总署提出申请——这个数据比世界上其他任何一个国家都多的多。
They heard a bottle being smashed, then more raucous laughter.
他们听到瓶子被打碎的声音，然后是更多刺耳的笑声。
She gave him a quick, upward look, then lowered her eyes.
她飞速地抬眼看了看他，然后又垂下双眼。
Michael was given a complete going-over and then treated for mononucleosis.
迈克尔接受了详细的全身检查，然后进行了单核细胞增多症的治疗。
He opened his attaché case, removed a folder, then closed it again.
他打开了他的公文包，拿出了一个文件夹，然后又把它合上了。
Travis Lee then hit a grounder to second baseman Mark Bellhorn.
然后，特拉维斯·李击出一记滚球给二垒手马克·巴尔霍恩。
He then built a 10-bike lead before lapping his first rider on lap 14.
他领先了10辆自行车的距离，然后在第14圈又超过了前一个车手一圈。
The animals are herded into a bay, then butchered.
动物被赶到隔栏内，然后被屠宰。
We rested for a while then pushed on to the next camp.
我们休息了一会，然后继续朝下一个营地迈进。
She debated with herself for a while, and then picked up the phone.
她仔细琢磨了一会儿，然后拿起了电话。
She dipped a quill in ink, then began to write.
她把羽毛笔蘸进墨水中，然后开始写字。
I'll start with some generalities and then examine a few specific examples.
我首先进行概述，然后会分析几个实例。
He noted the latitude and longitude, then made a mark on the admiralty chart.
他记下经度和纬度，然后在海图上作了标记。
The film starts off realistically and then develops into a ridiculous fantasy.
电影开始的时候比较逼真，然后却发展成为荒谬的幻想。
Malcolm wanted to mix the beginning of a sonata, then add Beethoven for a few measures, then go back to Bach.
马尔科姆想要在开头部分加入一段奏鸣曲，然后加上几个小节的贝多芬作品，然后再回到巴赫的作品。
He started humming a tune, then interpolated the odd word as though having difficulty remembering.
他开始哼起一个曲调，尽管记得不太清楚，他又插入了几个词。
Then came a bunt from Russ Davis.
接着鲁斯.戴维斯打出了一记短打。
He then segued into a discussion of atheism.
然后他转入对无神论的论述。
His family then moved to a slightly larger house.
他的家后来搬到了一间稍微大一点儿的房子。
Then there was a woman's voice, rising shrilly above the barking.
然后是一个女人的声音，尖利刺耳，高过了狗吠声。
She eventually used a cane, then a walker, and finally was confined to the house.
结果她拄上了拐杖，之后又用上了步行器，最后连房门都出不了了。
Why don't you hire a car? Then you'll be able to visit more of the area.
你怎么不租辆汽车？那样的话，你可以多参观些地方。
He aimed his rifle, fired a single shot, then ejected the spent cartridge.
他用步枪瞄准，开了一枪，接着排出了空弹壳。
He aimed his rifle, fired a single shot, then ejected the spent cartridge.
他用步枪瞄准，开了一枪，接着排出了空弹壳。
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