单词	當患難之際
释义	同DISTRESS
随便看	axiom of congruence axiom of connection axiom of continuity axiom of denumerability axiom of extensionality axiom of incidence axiom of incidence -- incidence axiom axiom of incidence ; incidence axiom axiom of induction axiom of infinity axiom of order axiom of parallel axiom of parallels axiom of reducibility axiom of second countability axiom of second countability -- second axiom of countability axiom of second countability ; second axiom of countability axiom of separation axiom of superposition axiom of union axioms axioms of equality axioms of probability axiom system axion