Effective research and surveillance programmes are needed to detect types, frequency and clinical Settings of such events.
需要有效的研究和监测规划以查明这类事件的类型、发生频率和临床环境。
2
To determine the frequency and nature of childhood injuries and to explore the risk factors for such injuries in low-income countries by using emergency department (ED) surveillance data.
利用急诊室的监测数据确定低收入国家儿童受伤的频率和性质，并探讨造成此类伤害的风险因素。
3
For example, both the EAS(Electronic Article Surveillance) system and the RFID(Radio Frequency Identification) system need high effective the short-range radio communication antenna.