The success of this project is influenced by a lot of uncertainty.

This new software has backward compatibility, so you can use old version data without any problems.

These two software have complete interchangeability.

This new software maintains upward compatibility with the old version.

His research mainly focuses on the plantigradism of mammals.

He learned about unguligradism in his zoology class.

Cats are digitigrade animals, they walk on their toes.

Sufficient caution is necessary when handling radioactive materials.

She has polycystic ovary syndrome.

He is writing a thesis on monotheism.