Yán / jiū / rén / yuán / zài / cháo / shī / de / tǔ / rǎng / lǐ / fā / xiàn / le / yì / tiáo / jī / zhì

研究人员在潮湿的土壤里发现了一条笄蛭。

Researchers found an earthworm of this kind in the damp soil.