gapen. 裂口、張嘴、打哈欠vi. 裂開、張嘴、打哈欠學術名詞碎礦機張口:礦冶工程呵欠:獸醫學張口:獸醫學英文釋義an expression of openmouthed astonishmenta stare of amazement (usually with the mouth open)look with amazement; look stupidlybe wide open