definition
move through a space, circuit or system, returning to the starting point
sentence
Women who tested positive for circulating tumor DNA were 12 times more at risk of cancer recurrence than those who tested negative.
No director for the new film has been announced, although rumors have been circulating that James would like to direct the movie himself.
difficulty
easy
toefl frequency
3
toefl classification
adjective
circulatory
verb
circulate
noun
circulation