"the houses were randomly scattered"
"bullets were fired into the crowd at random"
arbitrarily的用法和樣例：
例句
用作副詞 (adv.)
Bondsmen may withhold their services arbitrarily. 保人可以任意地不提供服務。
Physical properties are, in turn, arbitrarily subdivided into many categories. 物理特性，可以被任意地分為許多種類。
You can not compare him with someone you knew before, then judge him arbitrarily. 不能拿他跟舊相識去比較，然後武斷地去評判他的好壞。
Arbitrarily dismissing the direct link between increasing sexual promiscuity and the rapid spread of sexually transmitted diseases would be foolhardy. 武斷地無視性亂行為的增多和性傳播疾病的迅速蔓延之間的直接聯繫是魯莽的。
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