From the position of the legs, the curve of the abdomen, and the lack of wing marks, the researchers suspect that the imprint was made by an ancient mayfly that held its wings upright when at rest.

从化石上腿痕迹的位置，腹部的曲线印记，且化石中缺少翅膀的标志，研究员猜测那些痕迹是古浮游笔直的竖起一对翅膀休息时留下的。

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From the position of the legs, the curve of the abdomen, and the lack of wing marks, the researchers suspect that the imprint was made by an ancient mayfly that held its wings upright when at rest.

从化石上腿痕迹的位置，腹部的曲线印记，且化石中缺少翅膀的标志，研究员猜测那些痕迹是古浮游笔直的竖起一对翅膀休息时留下的。

youdao