Because the hydrogen molecule is very small, it can easily diffuse through many materials, so that the balloon will deflate quickly.

As the membrane of the air sacs is so thin, oxygen can easily diffuse in and out.

At elevated temperatures easily diffuses through metals.

While stoma are open, water vapor can easily diffuse out of plant tissues, a process known as transpiration.

As a gas, it could easily diffuse backward.

During this timespan, drugs injected into the artery can easily diffuse though the gaps between cells directly into the brain.

Only small nonpolar molecules, such as oxygen can diffuse easily across the membrane.

Hydrogen easily diffuses through heated palladium; thus, it provides a means of purifying the gas.

The aroma diffused easily in low gee; it was exquisite.

Oxygen can easily diffuse through the red blood cell's cell membrane.