In its highest part there was a guard who kept a sharp eye on potential approaching of kardjalii.

However, as the fuel load approached that of La-9, so did the performance.

The sun was about to set when we heard the flapping of great wings approaching from ahead of us.

The eyes approached, yet of the thing that bore them I could distinguish only a claw.

"We will stay in it until nightfall, slowly approaching our destination all of the while."

By the time they approached him, of course, they'd have slowed.

She approached the building with her own daughter, both of them sobbing quietly.

But nothing ever actually approaches that sort of perfect efficiency.

Are we talking about a figure that could be approaching that sort of level, or substantially lower?

As conditions approach that of Earth, plant life could also be brought in.