Meanings of fixed quantities in English

Moral sufferings are not fixed quantities; they depend on the sensitiveness of souls.

Three different strengths of artificial wastewater passed through the system in fixed quantities.

They have called for fixed quantities to be kept, but with greater flexibility.

You can never work facts as you would fixed quantities, and say, given two facts, and the product is so and so.

The long-faced, too much sanctified female, doling out fixed quantities of monotonous nothings, is an abomination, and is calculated to drive man into chronic debauchery.