The letter had gone astray in the post.
这封信寄丢了。
The best-laid plans can go astray.
再周密的计划也有可能出错。
It’s easy to be led astray by the reports in the papers. 人们很容易被报纸上的报道误导。
Jack's parents thought the other boys might lead him astray. 杰克的父母认为,其他的男孩可能会把他引入歧途。