Applying the power to the sail is the next stage and a useful analogy here is that of closing a door.

A useful analogy is to imagine the local authority in the driving seat.

This is perhaps a more useful analogy than might at first sight appear.

Picard thought of a useful analogy that was not encouraging.

A useful analogy is in military intelligence.

A useful analogy for understanding this rationale is to consider objects measured on a weighing scale.

In addition, the reader is left wondering if the examples he has selected truly offer useful analogies to the world's current situation.

We can perhaps draw a useful analogy with pharmaceutical products.

They also employ analogies, useful in sharing spiritual realities in common terms.

The overarching goals of bioinformatics and systems biology may provide a useful analogy.