When children are playing alone on the green, In comes the playmate that never was seen.
孩子们独自在草地上玩耍时，那位从未被看见的玩伴便悄悄来到。
— Robert Louis Stevenson · A Child's Garden of Verses · The Unseen Playmate —
键盘照着敲一遍，更容易记住。
不用找输入框，直接敲键盘。