Shoes were readily available, as were hats...
The most common use is to hold a specimen for dissection. Before ray boxes were readily available, we used to use large pins for optics experiments.
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Because they are the most readily available and easiest to use energy source. We need to use any and all available energy sources. Fossil fuels have many drawbacks, but their near global availability and ease of use guarantees that they will be used even with such drawbacks.
There is a somewhat subtle difference in meaning between the two words in that the thing that is "readily" available for instance, is not necessarily "easily" attainable. That is, there might be plenty of things available, but difficult to attain, whereas something which is easily attainable might be in short supply, but not hard to get at. Knowledge, for instance, is readily available, but not always easily come by.
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As it is similar in structure to human hearts and they are readily available whereas most humans are buried with their hearts.
Vegetable oil or rubbing alcohol can effectively dissolve tar without posing harm to humans. These substances are safe, environmentally friendly, and readily available for use.
Only a small percentage of freshwater is readily available for humans to use because the majority of Earth's freshwater is locked up in glaciers, ice caps, and underground aquifers. Surface water bodies like lakes and rivers account for a small fraction of total freshwater, and not all of this is easily accessible due to pollution or contamination.
It was readily available and a useful resource.
It was a readily available shelter before humans developed the skills of building.
The information is readily available on our website. The combination of chemical elements into molecules is readily understood by most students.
94% of people who have it readily available.
no it ain't potassium ain't readily available
The pizza is readily available
Early humans likely used sinew, plant fibers, or animal tendons to tie down the stone for a hammer. These natural materials were readily available and would have been strong enough to secure the stone in place for use as a tool.
Oddly, the answer is as simple as "the stones were readily available."