cooing

v.

（鸽）咕咕地叫，发出鸽叫般的声音( coo的现在分词 )；温柔可爱地说话；

SMILING, COOING, AND "THE GAME"
Cooing Activity and Censusing of the Mourning Dove
Female cooing promotes ovarian development in ring doves.
Cooing Activity and Nesting of Mourning Doves in Northeastern Colorado
Features of infant sounds: the emergence of cooing.
Reappraising Factors Affecting Mourning Dove Perch Cooing
Squawking, tweeting, cooing, and hooting: analyzing the communication patterns of government agencies on Twitter
Simulation and parameter analysis of a two-stage desiccant cooing/heating system driven by solar air collectors
Two-stage partial melting and contrasting cooing histories within the Higher Himalayan Crystalline Sequence in the far-eastern Nepal
The relation between index-finger extension and the acoustic quality of cooing in three-month-old infants.