Each time you press instruction key, you will hear the indicator sound of swoosh from the phone.

每按一次指令都会听到话机内“哗”的提示声音。

These are present many colleges and universities are discussing and the research topic and speeds up one of adjustment program of instruction key work.

这些是目前许多院校正在探讨与研究的课题和加快调整教学大纲的重点工作之一。

The key is the stylesheet processing instruction (PI) in the second line.

关键是第二行中的样式表处理指令（PI）。