Should single-level (small or narrow) that takes the challenge to upgrade to multi-level be even more commendable?

单层（甚或狭小的单层）而挑战了复层关系是否更应得到肯定？

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Struts 2 OGNL expressions reduce the difficulty of writing complex code to transform single-level form beans to multi-level domain objects.

Struts 2 OGNL表达式减小了编写复杂代码、将单级表单beans转换为多级域对象的难度。

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But Alan Smithers, of Buckingham University, warns that single-level tests are no panacea.

ECONOMIST: School examinations

The single-level home for sale in Phoenix offers a split floor plan with a master suite facing the back patio.

FORBES: How Much House Can You Get for $450,000?

Third Rail Projects recently moved its wildly imaginative multimedia theatre-dance piece from a single-level hospital to a creaky three-story school building, now dressed to be a mental ward in Wonderland.

NEWYORKER: Then She Fell