Some people are very interested in these "first day covers."
有些人对“首日封”非常感兴趣。
Snuggled up in bed on a cold winter day, warm under the covers.
在寒冷的冬夜一起依偎在被窝中取暖。
In many places, a blanket of clean white snow covers the ground on Christmas Day.
很多地方在圣诞节时，洁白的雪毯覆盖着大地。
Also available on the day of the construction end covers the surface of clean water.
也可在当天施工完时用水将井盖表面清洗干净。
Also available on the day of the construction end covers the surface of clean water.
也可在当天施工完时用水将井盖表面清洗干净。
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