emergency: n.突然事件;紧急情况,非常时期。 take emergency measures 采取紧急措施。 be prepared [ready] for all emergencies 以备万一。 in this emergency 在这个危急时刻。 meet emergencies 采取应急措施。 in [on] an emergency =in case of emergen
door: n.1.门,户。2.入口,门口;通道,门径,门路,关口。3.一户,一家。4.【船、机】盖,口。短语和例子the front [back] door 正[后]门。 a street door 临街大门。 shut the door behind [after] him 把他身后的门关上。 Mind the door! 注意门户! Is the door to 是从这道门走吗?