Native speakers can tell the difference between tone-distinguished words by context.

Low voltage is a relative term, the definition varying by context.

There is no standard way to indicate which are which, but we can generally tell by context.

The precise meaning of the term varies by geography and context.

Another example would be interpreting any word as being a call in the game, even when it's obvious by context that it is not so.

The meaning of the word, however, can vary somewhat by context:

These marks are also discarded with the vowels, so that often one has to understand by context.

The interpretation of quality is variable, however, by product and service and context.

Individuals are identified, and the network is tuned to respond to their presence by context.

His personality seemed to vary by question and context.