兴隆遗址第一期(8700~8000a BP)、第二期(8000~7600a BP)和第三期(7450~7000a BP)木炭组合变化图 (IMAGE) Science China Press Caption (a)不同木炭种属含量变化; (b)主要木本植物年轮曲率变化, (W)、(M)和(S)分别代表微弱、中度和强烈弯曲 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.