accidentally 

英汉解释

adv. 意外地；偶然地

同义词

r. by chance，incidentally，unexpectedly，unintentionally

反义词

r.   advisedly，deliberately，designedly，intentionally

参考例句

1. Most of the photos in the exhibit were captured accidentally.
大部分展出的照片都是偶然拍摄到的。
2. Turtle suddenly lost control, he accidentally fell on the back of the rabbit.
乌龟顿时失去了控制，竟意外地落在了兔子的后背上。
3. A group of children of various ages was read stories in which people caused harm, some of those people doing so intentionally , and some accidentally.
一组含各个年龄段的小孩子学习“哪些人会造成伤害”，这些造成伤害的人中有些是蓄意的，有些是无意的。

英英解释

adv.
  1. without advance planning
  2. in an incidental manner
  3. without intention; in an unintentional manner

网络释义

accidentally
偶然地; 偶然地, 意外地; 偶然; 偶然的;
Accidentally stupid
新浪潮;
accidentally injure
误伤;
Meet accidentally
偶遇;
accidentally convergent
偶然收敛;