Randomness effect on cooperation in memory-based snowdrift game .
有记忆铲雪堆博弈中随机性对于合作的影响。
Formation mechanism and characteristics of snowdrift of highway in heilongjiang province .
黑龙江省公路风吹雪灾害形成机理与分布特征。
Theodore found grandma squirrel standing on top of a huge snowdrift . She had on a fuzzy coat with pink and white stripes . She was so busy scrubbing her windows that she didn 't see theodore coming .
