Engine room noises with effective control measures can satisfy the environmental protection requirement ( 55 db ( a ) in the daytime and 45 db ( a ) in the nighttime ) while guaranteeing the normal operation of the engine unit 经过有效控制的机房噪声都可在保证机组正常运转情况下满足相应的环保标准要求，达到昼间为55db （ a ） ，夜间45db （ a ） 。
At the heart of every fighting falcon coming off the line is the lightweight fighter concept championed by john boyd , tom christie , john chuprun , harry hillaker , chuck meyers , pierre sprey , everest riccioni , and other members of what came to be known as the fighter mafia 被称为‘战斗机黑手党’的约翰?勃德，汤姆?克里斯特，约翰?切伯伦，哈里?希雷克，切克?梅耶斯，皮尔?斯皮尼，埃瓦内斯?里茨尼等人坚持每一架从生产线上下来的战隼从本质上都应该是昼间战斗机这样一个观念。
A thorough history of personalor job - related issues , caffeine , alcohol and other drug use , related medical problems , abnormal leg and body movements at night , problems with daytime napping and somnolence as well as night time snoring , and apnea spells will all direct the practitioner to the cause of most problems 详细的病史检查，包括个人及工作情况问题，咖啡因、酒精及其他药物服用史，相关内科疾病，夜间腿部及躯体异常运动，昼间瞌睡，夜间打鼾及呼吸暂停时间等情况，都可以引导医生找到多数失眠的原因。
