Backward and Forward Compatibility向前兼容和向后兼容

Backward and forward buttons可以向前或者向后按

pace backward and forward焦急地来回走动

backward and forward reasoning双向推理

backward and forward mode反激式

backward and forward extrusion正反挤压

backward and forward linkages后向联系

backward and forward integration前后向合并

backward and forward bidding反