For the next 40 years, the role of the office grew slowly but perceptibly.

Science grows perceptibly in Taicang senior high school.

The overcast grew perceptibly thicker, and Garion felt the first drops of a chill rain striking his face.

A brilliant point of blue light, brighter than a star, grew perceptibly as we watched.

As he spoke, his face grew perceptibly harder.

But his face grew perceptibly longer while she was telling him her tale, leaving nothing out.

And then the little room began to grow perceptibly warmer.

Local trade grew perceptibly and a thin stratum of relatively well-off artisans and merchants began to emerge.

The habitat grew perceptibly colder as the engineer channeled power from life support to communications.

It was still far off, no bigger than a bumblebee against the blackness; yet second by second, it grew perceptibly.