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Conclusion The concentration of BTX is higher when traffic jammed.
结论大气中苯系物浓度与车流量及路况有关，车流量较大尤其是道路堵塞时，苯系物浓度较高。
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Thomas hesitated, and then took the slip of paper and jammed it carelessly into his pocket.
托马斯迟疑一下，接过纸条，不经意地塞在口袋里。
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