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The theory is of limited usefulness.是什么意思？

The theory is of limited usefulness.

这个理论用途有限。

相关词汇
the theory is of limited usefulness

the

art. 指已提到的人（物），指说话人与听者已知的人（物），用于独一无二的事物前，与形容词最高级和序数词连用；

theory

n. 学说，理论，原理，推测；

is

vt.& vi. 是（be的三单形式；n. 存在；

of

prep. 关于，属于…的，由…制成；aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气]；

limited

adj. 有限的，（君主权力）受宪法限制的，〈美〉乘客名额有限制的，（智力，能力等）有限的；n. 高级快车，直达的火车或汽车；

usefulness

n. 有用，有益，有效，效能；
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