The sky was simply darkness overhead; even the flying clouds pursued their way invisibly to human eyesight.
头顶的天空只剩黑暗；就连疾行的云，也沿着人眼看不见的路径前进。
— Robert Louis Stevenson · Travels with a Donkey in the Cevennes · A Camp in the Dark —
键盘照着敲一遍，更容易记住。
不用找输入框，直接敲键盘。