Definition
By chance or without a specific plan, intention, or pattern.
隨機；隨意
The grand prize will be awarded to the first correct submission chosen at random from all eligible participants.
大獎將從所有符合資格的參與者中隨機選出的第一個正確提交者頒發。
To ensure fairness, research participants were selected at random from a larger pool.
為了確保公平性，研究參與者是從更大的群體中隨機選出的。
They chose a few streets at random for inspection, without any particular reason.
他們隨機選擇了幾條街道進行檢查，沒有任何特別的原因。