casually
adv.
偶然地,随便地,临时地
例句
By chance; casually.
偶然地；任意地
casually thoughtless or inconsiderate.
随便、欠考虑或者草率.
To shoot at casually.
随意射击
To say casually; remark.
评论随便地说；发表意见
To talk casually; chat.
闲谈；聊天