–I like the weather in Kunming. It's warm all year long.—Yes. And the temperature stays        zero all the time.

增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。

删除：把多余的词用斜线（\）划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：1）每处错误及其修改均仅限一词；

2）只允许修改10处，多者（从第11处起）不计分。

    The other day, some of my classmates and I took a bicycle trip along the “Renmin Road”, where was specially built for people to relax ourselves. The scenery along the road was fascinating, with trees, flowers, hills and lakes on both side. We stopped by a lake for a rest, where a good many of people were playing happily. But something unpleasant catch our attention, There was rubbish here or there, and there were many plastic bags and bottles floated on the surface of the lake. Such beautiful place was so serious polluted. What a shame! In the end, we couldn't help collecting the rubbish after we left.

三湾改编最重要的意义是(   )