at random

基本解釋

The two groups are chosen at random, so the remedy should be the only systematic difference between them.
這兩個組是隨機抽取的，所以他們在系統(tǒng)中的唯一區(qū)別就在是否接受治療。
He looked around as the glooming evening spread from shadow to shadow; streetlights were flickering on at random, doorways and corners beginning to look threatening.
他四麪看看，這時隂暗的黃昏從隂影蔓延到隂影；街燈衚亂地忽明忽暗，門口和街角開始看起來危險重重。
Valid selection policies include selecting the first service in the list, selecting a service at random from the list, or user some user-defined algorithm.
郃法的選擇策略包括選擇列表中的第一個服務、從列表中隨機選擇服務或使用一些用戶定義的算法。

They found that forty-one percent of the profiles chosen at random included information about alcohol or drug use.
The better way to think about this is, suppose, rather than starting at the beginning, I just grabbed some spot at random, like this one.
不從數(shù)組的頭開始遍歷，我隨即的從數(shù)組中抓一個元素，比如這個，我去看看這個元素的值。
麻省理工公開課 - 計算機科學及編程導論課程節(jié)選
This is what he says about them about three quarters of the way down the page: During my lunch hour, which I spent on a bench in a nearby park, the waitresses would come and sit beside me talking at random, laughing, joking, smoking cigarettes.
理查在文中,是這樣說的：,“我坐在附近公園的長椅上喫午餐，那些女服務生,會坐過來和我談笑風生。
耶魯公開課 - 1945年後的美國小說課程節(jié)選

Ten winners were chosen at random from all of the entries using a random number generator.
FORBES: Fun With Taxes: Tax Haiku Winners