/ˈθʌndə(r) ||; ˈθʌndɚ/noun [U] the loud noise in the sky that you can hear when there is a storm and that usually comes after a flash of light (lightning) 雷；雷声: a clap/crash/roll of thunder一声霹雳；雷声隆隆；一阵雷声
thunder²
/ˈθʌndə(r) ||; ˈθʌndɚ/verb[I]
1 (used with it 与it连用) to make a loud noise in the sky during a storm 打雷: The rain poured down and it started to thunder.大雨倾盆而下，并开始打雷。
2 to make a loud deep noise like thunder 发出雷鸣般的巨响: Traffic thundered across the bridge.车辆隆隆驶过那座桥。