They stumbled across a cure for tuberculosis while they were doing research on something else.

他们在对别的东西进行研究时，偶然发现了一种治疗肺结核的药。

youdao

They stumbled across a cure for tuberculosis while they were doing research on something else.

他们在对别的东西进行研究时，偶然发现了一种治疗肺结核的药。

youdao