He waved up at them, and they waved back, beaming at him.

他朝他们挥挥手，他们也笑着朝他挥手。

This was due to the reflecting power of the walls of ice, which threw the beams of our beacon right back at us.

那是四面冰墙的强烈反射，把探照灯的光波猛烈反射进客厅中来。

Harry could just make out Mrs. Weasley, Bill, Ron, and Hermione applauding Fleur politely, halfway up the stands. He waved up at them, and they waved back, beaming at him.

哈利能辨认出韦斯莱夫人、比尔、罗恩和赫敏在看台中排礼貌地为芙蓉鼓掌。他朝他们挥挥手，他们也笑着朝他挥手。