[书] （突然） sudden;abrupt;unexpected: 仓 ～ hurriedly;hastily;all of a sudden；～ 毙 die suddenly ◆猝不及防 be caught off guard;be caught unprepared;be taken by surprise;be put off one's guard； 猝发 burst； 猝灭[熄] quencher;quenching;extinction； 猝然 suddenly;abruptly;unexpectedly； 猝死 sudden death； 猝熄[灭] quenching;extinction