(original) It was given to me by a kind woman. (passive voice—using "by" makes it passive.)
A kind woman gave it to me. (same thought, but transformed to active voice)
The active voice phrasing has only one prepositional phrase ("to me".) The preposition "to" indicates the indirect object "me"; the direct object "it"needs no preposition.
I hope you can see that there is no logical need for (nor even a possibility of) a conjunction in the active voice construction, so there is likewise no logical need for a conjunction in the original construction.
Your example of the moonlight walk on top of the building uses a longer series of prepositional phrases.
Let's take a different example to see how this works:
- the keyhole of the lock in the door by the gate of the city...
The prepositional phrases attach consecutively, each preposition applying at its own level to link one noun logically to the next.
One can continue this indefinitely.
The A [of the B [in the C [by the D [of the E]]]]...
There is no need for a conjunction, because each noun has only one relation to the next one, which is fully specified by that preposition.
You might think of this as a stack, or a nest. The reader parses the multiple prepositional phrases by "unstacking" or "unwrapping" as indicated by the brackets, like evaluating a mathematical expression with parentheses. The nesting itself defines the relationships of the elements. Thus:
- the keyhole is of the lock, which is in the door, which is by the gate, which is of the city.
That's it. As we say... "No Ifs, Ands or buts about it!" http://www.thesaurus.com/browse/no+ifs+ands+or+buts+about+it
Or more accurately:
No Ands or Ors.
No conjunction needed. None possible. None "elided".
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oh, by the way, it's more idiomatic to say "under the moonlight" or "by the light of the moon"
It's clear when you understand what you place the definite article there for.
If you are speaking about technology in general, any kind of technology, not some specific or defined technology, then you don't need the definite article the. On the other hand if you refer to some specific or defined technology, one that was mentioned ealier or one that is known from the context, then you should place the definite article there.
Best Answer
When words are joined by a conjunction, they often share a common article. As long as they're not interrupted by other words, there's no problem.
It's simply not necessary to write between the 20s and the 30s. As long as they agree in number, and are using the same article (i.e. this doesn't work with an a/an combination), it's fine.
In your example, I prefer not omitting the, but that's a style choice, so follow your own preference here.