Left,until now,to odd,low-level IT…英文解释

Left,until now,to odd,low-level IT…英文解释Left ,until now,to odd,low-level IT staff to put right,and seen as a concern only of data-rich industries such as banking,telecoms and air travel,information protection is now high on the boss's agenda in businesses of every variety.其中的left和right在这是什么意思.有什么用?