swim about

UK
/swɪm əˈbaʊt/
US
/swɪm əˈbaʊt/

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Aren't those things swimming about in it — something like fish in the sea?
physics
плавать вокруг
Свободно перемещаться в жидкости.
A Honeymoon in Space
A Honeymoon in Space is a 1901 novel by George Griffith. It was originally serialized in abridged form in Pearson's Magazine in 1900 under the title Stories of Other Worlds. The scientific romance story depicts a tour of the Solar System, a type of story that was in vogue at the time.
A Honeymoon in Space