But more recently, companies have begun to plan more affordable " suborbital " flights — brief ventures just to the edge of space's vast darkness.
2015年12月六級真題（第二套）閱讀 Section C
Darkness is as essential to our biological welfare, to our internal clockwork, as light itself.
2015年高考英語浙江卷 閱讀理解 閱讀C 原文
I settled down in the darkness, and the curtains opened.
2016年高考英語浙江卷（10月） 語法填空 原文
If humans were truly at home under the light of the moon and stars,we would go in darkness happily,the midnight world as visible to us as it is to the vast number of nocturnal species on this planet.
2015年高考英語浙江卷 閱讀理解 閱讀C 原文
Like most other creatures, we do need darkness.
2015年高考英語浙江卷 閱讀理解 閱讀C 原文
When berlin restaurant customers ate in darkness, they couldn't tell how much they'd had: those given extra-large shares ate more than everyone else, but were none the wiser—they didn't feel fuller, and they were just as ready for dessert.
2018年高考英語江蘇卷 閱讀理解 閱讀B 原文
Nicholas Nickleby, his next novel, combines the darkness of Oliver Twist with the sunlight of Pickwick.