If anguish is too great, an elder may simply cease to discuss loss and just keep going at the level of practical consciousness.

When one uses a computer, an image is projected on the monitor screen which depends upon physical interactions going on at the level of hardware.

I'll also make a curved sign to go around the ramp in three spirals, at the level of the railing.

"It will be sufficient to keep the economy going at the current level of demand."

Or, put another way, an organism can go off the track if one thing goes awry at the molecular level.

"Zimbabwe is basically being left behind because of what is going on there at the political level," a senior conservation source said.

This scheme goes against all principles of sustainable management of water resources at the regional level.

And because of this we have a choice where to alter the theory when things go wrong at the observational level.

And the duet went on at the same level of energy and focus a very long time.