Beijing, for instance, found itself in great traffic trouble when the city announced to provide free metro service for its citizens during the Asian Games in 1990.
比如，1990年北京亚运会期间，当该城市宣布为市民提供免费地铁服务后，就遇到了巨大的交通麻烦。
2
Performance of hydraulic oils is very dependent upon the quality of base oil to ensure good filtration, troublefree operation and a long service life. ?
基础油的质量对液压油的过滤性能、液压系统的平稳运行和液压油的长寿命使用有着重大影响。
3
Designed as rugged and highly effective devices, the PMH-H will provide years of troublefreeservice.