утверждать, что

см. тж. иногда утверждают, что

They advocated that continents had drifted apart.

This is equivalent to the statement that all gases deviate from ...

The scientists argue (or reason) that this difference rules out ...

The proponents of nuclear power contend (or hold) that these installations are accident proof.

The firm maintains (or states, or asserts) it has techniques for improving ...

This hypothesis holds that the universe has always looked exactly the way it does today.

Источник: Русско-английский научно-технический словарь на Gufo.me