The engine seems to be trying, making an effort; you can even hear it breathing hard.

But the engines seemed to be holding up fine.

The engines seemed to be laboring even at full throttle.

The engine seemed, if anything, a little less energetic.

Every engine seemed to be Japanese these days, and made by robots.

And then the engine of the Beech 1900 seemed to explode.

But if two-stroke engines seem like yesterday's technology, they may also be tomorrow's.

And that tough little engine, which ran up to the 6,500-r.p.m. red line without complaint, never seemed to labor.

The truck's ailing engine seemed to be all right now!

The engines at this speed didn't even seem to strain.