emptiness

1. I feel I am in emptiness.
   我觉得我很空虚。
2. It is a world of emptiness.
   那是一个空虚的世界。
3. Man had overcome the emptiness of this land.
   人已经驱走了这片土地的空旷。
4. He stared out at the vast emptiness that was the sea.
   他放眼向辽阔无际的海洋望去。

Emptiness of Multi-pushdown Automata Is 2ETIME-CompleteEmptiness of Ordered Multi-Pushdown Automata is 2ETIME-CompleteOn-the-fly emptiness checks for generalized büchi automataEmptiness Formation Probability for the One-Dimensional Isotropic XY ModelChecking Timed Büchi Automata Emptiness EfficientlyThe Emptiness of the Lexicon: Reflections on James Pustejovsky's The Generative LexiconWeak Alternating Automata and Tree Automata EmptinessAn implementation of three algorithms for timing verification based on automata emptinessAn implementation of three algorithms for timing verification based on automata emptinessA simulation modelling approach to evaluating length of stay, occupancy, emptiness and bed blocking in a hospital geriatric departme...