落后的英文怎么縮寫

　　He walked away without a backward glance.

　　他頭也不回地揚長而去。

　　She strode past him without a backward glance.

　　她大步從他身邊走過，都沒有回頭瞧他一眼。

　　We need to accelerate the pace of change in our backward country.

　　我們應當為落后的祖國加快變革的腳步。

　　The car passed over the body twice, once backward and then forward.

　　那輛車把那人來回軋了兩次，先是倒著軋的，再是往前開著軋的。

　　He took two steps backward

　　他后退了兩步。