noun 下载 🔗分享 积雨云,雷雨云 A cloud, with a tall structure and a flat base, that is often associated with thunderstorms. Examples : "We canceled the school picnic when we saw a large cumulonimbus forming in the sky, because those clouds often bring thunderstorms. " 看到天空中正在形成巨大的积雨云,我们取消了学校的野餐,因为这种云通常会带来雷雨。 weather nature 与AI对话词汇游戏阅读练习