重症肌无力是一种较难治疗的疾病。

Myasthenia gravis is a disease difficult to treat.

youdao

许多人由于长时间持续工作而怠倦，陷入很难治疗的抑郁症。

Many people who are burned out for prolonged periods sink into depression which can be tough to deal with.

youdao

全膝置换假体周围的股骨远端，胫骨近端，髌骨骨折是非常难治疗的。

Fractures of the distal femur, proximal tibia, and patella that occur adjacent to a total knee replacement may be very difficult to treat.

youdao

Well, I talked about the problem of using plasmids in gene therapy, that it's very difficult to get them into cells.

我们之前讨论过,基因治疗中运用质粒的问题,质粒本身极难进入细胞

耶鲁公开课 - 生物医学工程探索课程节选