几年前，共享单车突然出现在中国城市的街道上。
A few years ago, shared bikes suddenly appeared on the streets of Chinese cities.
你只要用手机扫一下，就可以骑走一辆车，非常方便。
As long as you scan with your phone, you can ride a bike away — extremely convenient.
地铁站离公司还有两公里？骑车十分钟就到了。
The subway station is still two kilometers from your office? Ten minutes by bike and you're there.
共享单车不仅便宜，而且对环境好，很多人因此不开车了。
Shared bikes are not only cheap but also good for the environment, so many people stopped driving.
可是问题也来了：有人把车停在路中间，还有人把车骑回了自己家。
But problems came too: some people parked bikes in the middle of the road, and others even rode them home to keep.
后来，坏了的车越来越多，有的街道像一个自行车的“海”。
Later, more and more bikes lay broken, and some streets looked like a "sea" of bicycles.
共享单车让我们明白：一个好主意，还需要大家一起爱护它。
Shared bikes taught us something: a good idea still needs everyone to take care of it together.
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Key words 生词
共享gòngxiǎngshared; to share
单车dānchēbike
扫sǎoto scan
环境huánjìngenvironment
因此yīncǐtherefore
爱护àihùto cherish; take care of
Grammar note 语法点
不仅……而且……
"Not only A, but also B" — adds a second, often stronger point: 共享单车不仅便宜，而且对环境好。
她不仅会说汉语，而且说得很流利。— She not only speaks Chinese, but speaks it fluently.
把 + object + verb + result
The 把 structure moves the object before the verb to emphasize what is done to it: 有人把车停在路中间；还有人把车骑回了自己家。
请把自行车停在门外。— Please park the bicycle outside the door.
Check yourself 小测验
1. According to the text, how do you unlock a shared bike?
2. Which problem appeared after shared bikes became popular?
3. What lesson does the author draw at the end?