99e热国产最新地址获取,成人一a毛片免费视频,一级a爱看片免费观看,最近最新中文字幕大全免费一

文字稿:

This is Siberia – over 1,000 metres below ground.

And miners at Russia's largest nickel mine were given the surprise treat of some cheerful music.

Musicians swapped their stage costumes for hard hats and overalls for the day.

The company says it's all part of a plan to boost productivity and hope to hold more underground cultural activities to keep the positive attitude going.

Vocabulary 詞匯:

nickel mine 鎳礦

treat 款待

swapped 替換了

boost productivity 提高生產力

positive attitude 積極的態度