as-needed中文什么意思

恰如所需

• need:    n. 1.必要,需要。 2.缺乏,不 ...
• that are needed:    意为"所需的
• archive needed:    需要存档

例句与用法

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1. Ip communications involves the transmission of information in packets on an as - needed basis . the route a packet of information follows can and does change throughout the transaction , unlike the fixed path of a circuit
   Ip通信发展到按需求以包的形式进行信息传输，与电路（交换）中固定通道不一样，在一次交易中信息包经过的路由是可以并一定是改变的。
2. We inestigated whether the symptom - drien use of a combination of beclomethasone dipropionate and albuterol ( also known as salbutamol ) in a single inhaler would be as effectie as the regular use of inhaled beclomethasone and superior to the as - needed use of inhaled albuterol
   我们研究患者症状驱使按需单次吸入倍氯米松和沙丁胺醇治疗是否与规则的吸入倍氯米松治疗同样有效，是否优于按需的吸入沙丁胺醇治疗。
3. We investigated whether the symptom - driven use of a combination of beclomethasone dipropionate and albuterol ( also known as salbutamol ) in a single inhaler would be as effective as the regular use of inhaled beclomethasone and superior to the as - needed use of inhaled albuterol
   我们研究患者症状驱使按需单次吸入倍氯米松和沙丁胺醇治疗是否与规则的吸入倍氯米松治疗同样有效，是否优于按需的吸入沙丁胺醇治疗。