mutualism
noun[U]
biologyspecializeduk/ˈmjuː.tʃu.əlɪ.zəm/us/ˈmjuː.tʃu.əlɪ.zəm/arelationshipbetween twoorganismsin which theylivetogether andbenefiteach other
互助主义Reciprocating
- another
 - each other
 - give and take
 - it takes two to tangoidiom
 - mutual
 - non-reciprocal
 - one anotherphrase
 - one good turn deserves anotheridiom
 - ping-pong
 - reciprocal
 - reciprocate
 - reciprocation
 - reciprocity
 - requite
 - return
 - scratch
 - turn
 - two
 - two-way
 - you scratch my back and I'll scratch yoursidiom