你知道中国新四大发明吗？高铁、支付宝、网购和共享单车，共享单车的发明、已经不仅仅解决了，人们“最后一公里”的问题，它几乎改变了人们的生活方式。
本期节目结合本季的口语话题
Describe an important invention which has changed our lives.
来聊一下共享单车是
如何改变我们的生活的
《3分钟学雅思》2017第四季 第4期 点击观看
该话题参考文本
Public bike sharing is a total novelty that is considered as a terrific achievement here in China. Life has become more convenient for city dwellers, which facilitates the process of public transport, thanks to this brilliant invention. Wherever we go, we only need to scan a QR code with the apps installed in our smart phones and there will be an available bike nearby.
With a certain amount deposited initially, we can ride the bikes as long as we like. Sharing bike, in a nutshell, is the symbol of modernization and people are enjoying the sense of sharing. People of all ages are keen on riding shared bikes. It is a perfect solution to traffic problems in mega cities and a good way to lead a low-carbon life.
本期节目关键词
1. novelty 新生事物，发明或者创造，类似的词还有invention
2. city dwellers 居民
3. scan a QR code扫描二维码
4. be keen on 喜欢，喜爱
5. share bikes 共享单车
6. bike-sharing 单车共享的现象
7. in a nutshell 简而言之
8. low-carbon life 低碳生活
