1. He is replacing the old lightbulbs with energy-efficient ones.
他正在用节能灯泡替换旧灯泡。
2. The company is considering replacing its outdated computer systems.
公司正在考虑更换陈旧的计算机系统。
3. She is replacing the injured team member in tomorrow's game.
她将在明天的比赛中代替受伤的队员。