It was the only reliable means of navigation she had.

The people's only reliable means of communication with those outside their region is through Radio.

"If it is the fastest, most reliable means of travel, why should my company not benefit?"

Short stories turned out to be his most reliable means of turning literature into cash.

In an emergency, the Colony could fall back on the most ancient and reliable means of production.

Horses were the only reliable mean of communications and a necessity.

But, back then, we had other reliable means of communication.

It is a simple, reliable, and efficient means of power transmission.

Riding a mule was a more reliable means of transportation.

There will be no reliable means left to deal with many pest problems.