It came down in stair rods last night.

It's raining heavily outside, it's coming down in stair rods.

It's raining stair rods outside.

It rained stair rods yesterday.

It was raining heavily, coming down in stair rods.

It is raining stair rods outside.

The pathologist used a Gömöri stain to examine the tissue sample.

The angles of vanishing stability are crucial in determining the stability of the structure.

The angle of vanishing stability is an important concept in naval architecture.

The limits of positive stability are crucial for aircraft safety.