Section D
1. The Olympic rings are a symbol of the Olympic Games.
a symbol of … 的一种象征
Yellow was a symbol of imperial power in ancient China.
2. There are five rings, and they stand for the five parts of the world.
stand for 代表… The dragon stands for the Chinese nation.
3. You can easily find at least one of these colors in the flag of every country.
at least 至少 = over = more than
如：There are at least 400 students in our school.
4. improve our environment 改善我们的环境
(1) improve 改善，提高 I don’t know how to improve my English.
(2) improve oneself自我提高 we should study hard to improve ourselves
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