让我们来分解一下：<start_function_call — 函数调用开始，call: — 前缀，change_background_color — 函数名，{color:<escapered<escape} — 带转义标记的参数，<end_function_call — 函数调用结束。
Security researchers claim Persona, the provider behind Discord's UK age verification 'experiment', performs '269 individual verification checks' on user data, including those for terrorism and espionage
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（一）非正常损失的购进货物，以及与之相关的加工修理修配服务和交通运输服务；
The Chromebox and USB-C dock are mounted to the back of the desk and visually obscured by the plywood. The smart card readers I need for work, Obi200, and USB-C switch are mounted to the underside of the top shelf, out of sight.