向后兼容(BC)和向前兼容(FC)方式都是通过version属性触发的，而不是处理程序开关或者启动选项。

Backwards compatibility (BC) and FC modes are always triggered by the version attribute, not by any processor switch or launch-time option.

youdao

采用它制作高频开关电源，不仅简化了电路，同时可以改善电源的电磁兼容性能，且降低了制作成本。

High frequency switching power supply made from it can not only simplify the circuit, but also can improve the EMC characteristics and reduce the cost.

youdao

开关主机和插卡是否兼容系统中的其它设备，以实现触发、控制及连接？

Are the switch mainframe and CARDS compatible with other equipment in the system with respect to triggering, controls, and connections?

youdao