Nevertheless I like to have a constant supply of fresh flowers in the house.
But they need constant supplies of food and even temperatures.
Acquire it by any means possible, and you will never be without a constant supply.
Leaving the farm as it is means we get a constant supply of food.
By growing it himself he made sure of a constant supply.
The system may need a constant supply of organic material, at least during the early stages.
Your heart muscle is working all the time, so it needs a constant supply of oxygen.
On Earth, we have a constant supply of fresh air.
But they had to have a constant supply of wood.
This ensured the constant supply of water throughout the year.