The K/D ratios of the players were impressive.

The kill-death ratios in the game were impressive.

The kill-to-death ratios of the players in the game varied greatly.

The kill ratios in the game were impressive.

The teeth-to-tail ratios of the military units vary depending on their mission.

The SpO2/FiO2 ratios of the patients were measured and recorded.

The PaO2/FiO2 ratios of the patients were measured and recorded.

The paO2/FiO2 ratios of the patients were measured and recorded.

The P/F ratios of the patients were measured and recorded.

The S/F ratios in the experiment varied significantly.