Some kinds of acids react on metals to cause chemical changes.

有几种酸对金属起作用,会引起化学变化.

The messages are usually marked by the tools so that following filters can react on this and, for example, move virus messages to a special folder.

信件通常先由这些工具作标记，再让过滤器起作用，最后采取操作，例如，将感染病毒的信件移到特殊的文件夹。

How do acids react on metals?

酸对金属起什么反应？

How does acid react on metals?

酸在金属上如何起反应?。

Applause may react on the speaker.

鼓掌也许对讲话者有影响。

How do the acids react on the metals?

酸对金属会起什么作用？

Strong personalities react on others, while weaker personalities are reacted on.

强者影响他人，而弱者则受影响。