Partitioning across multiple databases wouldn’t be a big deal if it were not for the fact that cross-database queries are not supported, forcing any unions or joins to be done in memory.
由于跨数据库查询不被支持，所以跨多个数据库的分区是个棘手的问题，任何union或join操作都需要在内存中完成。
SimpleDB also doesn't support the notion of cross-domain joins, so you can't query for items in multiple domains.
SimpleDB也不支持跨域联接的概念，因此您不能查询多个域中的项目。
After China joins WTO, the enterprises in his west hill face the challenges from the enterprises at the developed area and the cross nation ones as well.
我国加入WTO以后，西部企业面临着发达地区企业和跨国企业的双重挑战。
After China joins WTO, the enterprises in his west hill face the challenges from the enterprises at the developed area and the cross nation ones as well.
我国加入WTO以后，西部企业面临着发达地区企业和跨国企业的双重挑战。
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