乘坐地铁: by undergroundtake the subwaytravel by subway
Example Sentences:
1.
Mtr has been carrying out the " mtr station improvement programme " since 1999 in order to improve the environment of mtr stations and operational efficiency 地铁公司自一九九九年开始推出地铁车站改善计划,以改善车站的环境及营运效率。