insurance
n. 保险，保险业

limit
n. 限制

lumber
n. 木材

metal
n. 金属

mineral
n. 矿物

mining
n. 采矿，矿业

muscle
n. 肌肉

ocean
n. 海洋

plastic
n. 塑料

recreation
n. 娱乐

sociologist
n. 社会学家

store
V. 储存

technologist
n. 技术专家

technology
n. 技术

utility
n. 效用；公用事业

compete with
与…竞争

depend on
依靠

real estate
房地产

result from
来源于…

Merry Learning

As an instructor, I try to lighten the stress of important exams by sticking in a lighthearted question at the end. Before Christmas break one year, the last question read: "Your instructor wishes you: (a) An enjoyable holiday; (b) A Happy New Year; (c) A restful vacation: (d) All of the above."
One of my students, correctly anticipating his low grade on the exam, added a choice of his own: "(e) Had studied more!"