不过就目前而言，最有希望的领域或许还是实体基础设施这一方面。
Yet the most promising field for now may be physical infrastructures.
另一方面，实体bean也有四个主要缺点。
On the other side of the coin, entity beans suffer from four basic disadvantages.
一方面，没有人造物离开了他们的实体能存在。
On the one hand, no artefacts exist apart from their material instantiation.
一方面，没有人造物离开了他们的实体能存在。
On the one hand, no artefacts exist apart from their material instantiation.
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