This approach is foreign trade enterprise search engine marketing (trade SEM).
这种方式就是外贸企业搜索引擎营销(外贸sem)。
This is done by Internet advertising, an important chunk of which is Search Engine Marketing.
这是通过互联网广告，一个重要的一块是搜索引擎营销。
This is done by Internet advertising, an important chunk of which is Search Engine Marketing.
这是通过互联网广告，一个重要的一块是搜索引擎营销。
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