1.  In skyscrapers, there are both men and women typing, or looking over files or doing something else; in hospitals, there are also man and woman doctors taking care of or operating on patients carefully; on the roads, there are still also traffic policemen and policewomen.

2.  And the simple physical facts always become associated with complex psychological qualities, but this psychological mechanism can operate only as long as the behavior of men and women does not transgress the generally accepted limits.

3.  Meanwhile, cashiers are usually women, because they can easily operate on the small keyboard with their slim fingers.

4.  Nevertheless, with the rapid development of social economy and culture, a modern university and its role are more crucial to operate social system.

5.  Without your devotion, the company can't operate; without your brilliance and creativity, the company can't be such a competitive and popular one; without your determination and passion, the company can't be united to realize the same goal.

6.  If you want to swim or to play ping-pong well, you must practice it over and over again until you can operate or perform it automatically.

7.  When he woke up after the surgery, he had a terrible stomachache and had to operate again.

8.  To make sure our business operates well there, we are going to choose Brazil to be our test-market.

9.  Unfortunately, less than six months after their wedding, there is something serious in Clyde's foot and stomache and he had to get operated twice.

10.  In the domestic and foreign areas it also operates 85 packaging products factories, has 15 wood processing factory and 19 other manufacturing facilities.