The economic situation has changed considerably.是什么意思？

The economic situation has changed considerably.

经济形势已发生了相当大的变化。

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；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

economic

adj. 经济的，经济学的，合算的，有经济效益的；

例句
He's already altered several of the proposals in his economic plan to accommodate demands of special interests.
他已经改动了经济计划中的几项提议以迁就特殊利益集团的要求。

situation

n. （人的）情况，局面，形势，处境，位置，[心理学]情境；

例句
The foreign minister admitted he was still anxious about the situation in the country...
外交部长承认对于该国的局势他仍然颇感忧虑。

has

v. 有( have的第三人称单数 )，（亲属关系中）接受，拿，买到；

例句
...the operation a patient has had.
病人做过的手术

changed

[医]变化的，改变的；

例句
Since the Sixties, afforestation has changed the Welsh countryside.
60年代以来，植树造林已经改变了威尔士的乡村面貌。

considerably

adv. 相当，非常，颇；

例句
We have a buoyant economy and unemployment is considerably lower than the regional average...
我们经济繁荣，失业率远低于地区平均水平。