指着用英语表达为 "pointing at"。这个短语来源于动词 "point"，表示 "指着" 或 "朝着" 的意思。
例句：
He pointed at the board and asked the students to read the word. (他指着黑板问学生们读单词。)
She pointed at the direction they needed to go. (她指着他们需要走的方向。)
He pointed at the suspect and identified him as the thief. (他指着嫌疑犯并确认他是小偷。)