With some careful testing, the service could support consumers sending older versions of the request documents. An API change, as well as being "extra field" level, could also be more far reaching.
经过仔细的测试之后，服务将可以支持客户发送旧版本的请求文档。
2
Sensors detect when dust concentrations reach a critical level and then an electric charge energises the material sending a dust-repelling wave across its surface.
当传感器发现粉尘浓度达到了临界水平，就有一定的电荷促使该材料发出除尘波越过其表面。
3
Export events to XML to see whether the low-level monitor models are receiving and sending events.