at random
固定短语，random 作名词，意为“随机地”。
The samples were selected at random.
样品是被随机挑选的。
随机；偶然
矿脉走向；随意
A roving motion or course without definite direction; lack of rule or method; chance.
A roving motion; course without definite direction; lack of rule or method; chance.
The direction of a rake-vein.
The numbers were selected at random.
这些数字是随机选择的。
用法提示：这里'at random'是固定短语，其中'random'作名词，表示'随机地'。
They picked a winner at random from the entries.
他们从参赛作品中随机抽取了一位获胜者。
用法提示：'at random'作状语修饰'picked'，'random'为名词，表示随意的方式。
The samples were taken at random from the population.
样本是从总体中随机抽取的。
用法提示：'at random'强调采样过程中无偏差，'random'为名词，意为随机。
固定短语，random 作名词，意为“随机地”。
The samples were selected at random.
样品是被随机挑选的。
非正式用法，random 作可数名词，指“陌生人”或“随意的事物”。
Don't trust a random you meet on the street.
不要相信你在街上遇到的随便一个人。
grammar · medium
易错句子Click the button to select a winner random.
正确表达Click the button to select a winner at random.
中文学习者常受副词‘randomly’不足的影响，将形容词‘random’误用作副词。‘at random’是固定短语，意为‘随机地’，应使用此短语或副词‘randomly’。
grammar · medium
易错句子The numbers were chosen in random.
正确表达The numbers were chosen at random.
‘in random’不符合英语介词搭配，正确固定短语是‘at random’，表示‘随机地’。介词‘at’在短语中表示‘按照某种方式’。
random（名词）指任意一个随机的事物或属性，而randomness是抽象名词，指‘随机性’这个概念本身。
random（名词）不能作状语，而randomly是副词，用于修饰动词或形容词，表示行为方式是随机的。
haphazard强调缺乏计划导致的混乱，而random更强调概率上的无规律或缺乏目的性。
随机地；胡乱地
She picked a card at random from the deck.
她从那副牌里随机抽了一张。
Choose the next layer that will help you use random with more confidence.
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