random

柯林斯词典

1. ADJ A random sample or method is one in which all the people or things involved have an equal chance of being chosen. 随机的
The survey used a random sample of two thousand people across the Midwest. 这项调查使用的是对中西部地区2000人的随机取样。
2. randomlyADV 随机地[ADV with v]
...interviews with a randomly selected sample of 30 girls aged between 13 and 18. …对随机抽取的30名年龄在13至18岁之间的女孩的访谈。
3. ADJ If you describe events as random, you mean that they do not seem to follow a definite plan or pattern. 随意的
...random violence against innocent victims. …对无辜受害者的随意攻击。
4. randomlyADV 随意地[ADV with v]
...drinks and magazines left scattered randomly around. …随意四处散落的饮料和杂志。
5. PHRASE If you choose people or things at random, you do not use any particular method, so they all have an equal chance of being chosen. 随机地
We received several answers, and we picked one at random. 我们收到了好几个答案，就随机地拣选了一个。
6. PHRASE If something happens at random, it happens without a definite plan or pattern. 随意地
Three African-Americans were killed by shots fired at random from a minibus. 3名非洲裔美国人被从一辆小型公共汽车中胡乱射出的子弹打死了。

And what might be the underlying significance of these supposedly random acts of violence ?
To my untutored eye that just looks like a load of random brush strokes and yet it's a very valuable painting .
It seems that the attack was a random act of violence .
The survey was carried out among a random sample of voters .
The security guards carried out random checks on people entering the building .