視角: visual angle / 資格: qualifications / 視覚: vision - sense of sight / 四角: square / 刺客: assassin / 死角: blind spot, dead angle

兎: rabbit

dripping heavily / (by extension) dripping heavily; exuding (positive meaning); or, escaping in large amounts (negative meaning)

(mathematical analysis) Banach space - a normed vector space which is complete, in the sense that Cauchy sequences converge