For many years was the line's biggest source of revenue.

China has become of the world's biggest sources for research and development personnel.

I would say this should not be a big source of concern to you.

One big source of long-distance fear will be the Internet.

But the drug can be a big source of cash for these doctors.

Oil is the biggest single source of the world's energy.

Companies have borrowed to pay for capital investment, a big source of economic growth.

The biggest source of revenue for most teams is television.

"And I guess if there was a big source of power, he'd try to get to it, right?"

The baby was a big source of joy for her.