chain letter

n.

连锁信（收信人须转交他人者）；

复数：chain letters

'Chain Letter'
CHAIN LETTER
Chain letter
Tracing information flow on a global scale using Internet chain-letter data
Two Probability Models of Pyramid or Chain Letter Schemes Demonstrating That Their Promotional Claims Are Unreliable
A NON-HOMOGENEOUS MARKOV MODEL OF A CHAIN-LETTER SCHEME
Disarmament Chain Letter Takes on Life of its Own
Chain Letter: Encyclopedia of American Folklore
A WARNING ABOUT IMMINENT CALAMITY IN COLONIAL FRENCH WEST AFRICA: THE CHAIN LETTER AS HISTORICAL SOURCE
Decoding a Chain Letter for Degradation
Image Bows Mobile Phone Marketing Campaign for 'Chain letter' Release
Chain Letter (Album)
Chain Letter (Album)