永安煤田二叠系煤样的HRTEM图像显示具有单核(a–c)和多核(d–f)结构的天然碳洋葱 (IMAGE) Science China Press Caption 单核天然碳洋葱(图a–c);多核天然碳洋葱(图d–f) Credit ©《中国科学》杂志社 Usage Restrictions Use with credit. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.