The traveling-salesman problem remains one of the most studied NP-hard problems in combinatorial optimization.

Engineers tested several traveling-wave tubes to boost signal amplification in the satellite transmitter.

The satellite's transmitter uses a traveling-wave tube to amplify microwave signals before transmission.

The prospect of space travel excites scientists and dreamers alike, but it demands careful planning, rigorous training, and international cooperation to visit and explore other worlds.

Many travel agencies offer specialized eco-tour packages to promote sustainable tourism.

Along the old stone wall, traveller's joy twined through the ivy, its clusters of creamy flowers glowing in the evening light.

Air travel has become more affordable over the past decade, making weekend getaways much easier.

The professor warned that time travel could create paradoxes that would unravel the fabric of history.

The time-traveller adjusted the ancient watch before stepping into the shimmering portal.

The Travelling Community gathered at the town hall to discuss preserving their cultural traditions.