You can keep it all year as long as no one else requests it, but someone else has, it looks like one of the professors in the sociology department.
只要没有其他人需要它，你可以借它一整年，但有人需要了，则可能会是社会学系的一位教授需要。
2
The boss added, "We want someone who can keep happy in whatever situations. Keeping happy is an ability."
老板补充说：“我们需要的，是在任何情况下都能保持快乐的人。保持快乐是一种能力。”
3
My mother was so touched by her gesture that she decided to go back to the store and give the cashier a five-dollar bill to keep on hand in case the same happened to someone else if they didn't have enough money for all of their groceries.