They looked at the sky and it seemed as dark as ever; then they saw the black shape of a tower or tree against it and knew that it was already grey.
他们望向天空,它似乎依旧漆黑;随后,看到塔或树的黑色轮廓映在天上,才知道天色已然泛灰。
— G. K. Chesterton · The Ball and the Cross · IX · The Strange Lady —