1. This ran on an ´operating system´ called DOS, produced by a then small company named Microsoft.
    这种电脑采用了一种被称为磁盘操作系统（DOS）的工作程序，而这种程序是由当时规模不大的微软公司生产的。

2. As he experimented he got to know more about how the human body works, and he found ways of operating on people so as to save their limbs and even their lives.
    在实验中他获得了更多有关人体运转的知识，并找到了为保住四肢甚至保住生命而对人体进行手术的方法。

3. Some time ago a British car manufacturer was accused of operating a fund to pay bribes, and of other questionable practices such as paying agents and purchasers an exaggerated commission, offering additional discounts, and making payments to numbered
    早些时候，一家英国汽车制造商被指控经管一笔基金行贿，还有其他一些可疑运作，如给代理商和客户高额回扣、提供额外折扣、向一些在瑞士银行开的匿名账户汇款等。

4. For its third quarter ending June 30, the first in which the park had been operating,
    6月30日结束的第三季度是主题公园正式运作的第一个季度。