1-tease out solutions找出解决方案;
2-be at the forefront of the efforts to do努力做某事;
3-growth flatlined增长水平下降;
4-It has become a bit pass to do做某事有点儿过时了;
5-the prime driver of traffic growth车流量多的主要因素;
6-public mass-transit公共交通
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