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Pronunciation varies by accent · noun
An interplanetary flight in which the gravitational attraction of a planet is used to provide acceleration and a change in course..
Use swing by when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Swing by means An interplanetary flight in which the gravitational attraction of a planet is used to provide acceleration and a change in course..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use swing by where its definition matches the intended context.
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