和周五白天明媚的天空相比，在晚上庆新年的时候，由于燃放大量烟花爆竹，北京的空气很明显地变差了。
Compared with the daytime blue sky on Friday, Beijing's air turned noticeably hazy at night due to fireworks displays as locals welcomed the New Year.
元有始之意，旦指天明的时间，也通指白天。元旦，便是一年开始的第一天。
Yuan has a beginning, refers to the time of the morning, also refers to the day. New Year's day, it is the first day of the year.
“元”有始之意，“旦”指天明的时间，也通指白天。
"Yuan" "has meaning only," Dan "means the dawn of time, but also refers to the day pass."
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