The country'sleadership had underestimated the depth of the crisis.是什么意思？

The country'sleadership had underestimated the depth of the crisis.

该国领导人低估了这场危机的严重性。

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。

had

v. 有（ have的过去式和过去分词 ），（亲属关系中）接受，拿，买到；

例句
He claimed that his parents had abandoned him...
他声称父母遗弃了他。

underestimated

v. 对…估计不足，低估( underestimate的过去式和过去分词 )，对…认识不足（或重视不够），低估，轻视；

例句
Ministers underestimated the magnitude of the task confronting them.
部长们低估了他们所面临的任务的艰巨性。

depth

n. 深度，深处，深海，深奥，奥妙，进深；

例句
The ship ran aground where there should have been a depth of 35ft.
船搁浅在水深本应为35英尺的地方。

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]；

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

crisis

n. 危机，危难时刻，决定性时刻，紧要关头，转折点；

例句
I do not accept that there is any kind of crisis in British science...
我不相信英国科学界有什么危机。