The program is a long-term mission of robotic exploration of Mars.

We had a lively time together before he decided to devote his life to a long-term mission.

Nationwide, we hope to see public radio listeners encouraging station managers to look beyond numbers to embrace their lofty long-term missions.

A single man, he has no commitments, is extensively experienced with long-term deep-space missions, and what's more, he's ready to get back out there.

Its biggest long-term mission so far has been of 300 monitors in Bosnia.

Let's think of the long-term mission, and let's use our golden opportunity to gain a bit of public sympathy.

It seems to me that the potentially long-term mission you're talking about might be something less than strictly necessary.

Consequently, are you able to tell us whether this delegation will have a short- or a long-term mission regarding the elections?

Silkworms have also been proposed for cultivation by astronauts as space food on long-term missions.

The phenomenon could pose a hazard for astronauts on long-term missions.