常见例句Cover jaws and throat in front, Cover mouth and teeth.在前麪中的覆蓋嘴和咽喉，涵蓋嘴巴和牙齒。The cover pebbling number for lexicographic product graphs and some strong product graphs were determined.對一個圖而言，滿足此條件的最小的自然數即爲此圖的覆蓋數。 返回 vertex-cover