cross-promotion
noun/ˌkrɒs prəˈməʊʃn/
/ˌkrɔːs prəˈməʊʃn/
[countable, uncountable] (business)- a set of advertisements or other activities that are designed to help a company sell two different products, or to help two companies sell their products or services together
交叉推销（同时推销一个公司的两种商品或两个公司的产品或服务）