"Making cities smarter is one way out, and I think this will in turn make cities greener," said Dan Hill, head of a research company.
“让城市更智能是出路之一,我认为这将反过来让城市更环保。”一家研究公司的负责人丹希尔说。
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Making their second appearance on Capitol Hill in two weeks, the heads of the big three carmakers warned that without immediate assistance one or more of the companies could go bankrupt.