irrigation
词形变化：
形容词: irrigational | 名词: irrigation | 动词过去式: irrigated | 动词过去分词: irrigated | 动词现在分词: irrigating | 动词第三人称单数: irrigates |
irrigation
词形变化：
形容词: irrigational | 名词: irrigation | 动词过去式: irrigated | 动词过去分词: irrigated | 动词现在分词: irrigating | 动词第三人称单数: irrigates |