It has not yet been ascertained, which is the precise time when it becomes indispensable to bung the cider. The best, I believe, that can be done, is to seize the critical moment which precedes the formation of a pellicle on the surface...

This system mainly regulates the blood pressure and maintains hydromineral homeostasis.

a quarter hour; a quarter century; a quarter note; a quarter pound

Kevin heard it on the radio / Hugh informed word of mouth / Carla read it in the news / Caught it all, just a touch