4 Unless you carry or store tools properly they can injure yourself or others.
4 Unless you carry or store tools properly they can injure yourself or others.
要很好地携带或存放工具，否则会伤到自己或别人。
4 Unless you carry or store tools properly they can injure yourself or others.
要很好地携带或存放工具，否则会伤到自己或别人。