您要查找的是不是：
- θ-開(kāi)L-集θ-L open set
- 準半開(kāi)L-集pre-semiopen L-sets
- 開(kāi)open
- γ-開(kāi)L-集γ-open L-sets
- δ-開(kāi)L-集δ-open L-sets
- 開(kāi)關(guān)power switch
- 花開(kāi)bloom
- 合集union
- 開(kāi)票make out an invoice
- 分集diversity
- 開(kāi)車(chē)to drive a car
- 集群colony
- 開(kāi)店set up shop
- 集線(xiàn)器hub (network)
- 開(kāi)花abloom
- 歌集songbook
- 開(kāi)門(mén)open (the) door
- 并集union of set
- 隔開(kāi)to separate
- 群集throng
