Sentence examples for these are formidable from inspiring English sources

These are formidable obstacles.

These are formidable works, to be sure.

All these are formidable economic achievements.

Literacy, opportunity, time, inclination: these are formidable barriers.

These are formidable challenges.

Adds Kisilevsky, "these are formidable problems".

Two of these, the Nogales (sometimes called the Feria) and Chicapierna brooks, meet just south of the village to form the Albuera river, but none of these were formidable obstacles and the river itself could be crossed at two bridges and a ford.

These challenges are formidable, but manufacturers in the AR industry have the resources and motivation to face them head-on.

These challenges are formidable.

These technologies are formidable.

These obstacles are formidable but can be overcome.