虽然欧洲人一般不交换商务礼物，但他们在拜访别的家庭时确实会遵循一些礼仪规则，比如送花。
And while Europeans don't generally exchange business gifts, they do follow some formal customs when visiting homes, such as bringing flowers.
这些虚拟礼物包括社交网络平台上代表个人形象的卡通图像，以及人们可以在虚拟世界及网站上进行交换的三维视效物体。
They range from cartoonish images on social networking profiles to three-dimensional-looking objects that people exchange in virtual worlds and on Web sites.
汤姆与约翰在圣诞节交换礼物。
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