Soviet expansionism was considered a real threat.是什么意思？

Soviet expansionism was considered a real threat.

苏联的扩张主义被认为是真正的威胁。

soviet

n. 代表会议，劳工代表会议，苏联，苏维埃；adj. 苏联的，苏维埃的；

例句
During the Soviet era and its immediate aftermath, the region was officially known as 'Middle Asia and Kazakhstan'.
在苏联时代和紧随其后的一段时期，该地区的官方名称为“中亚和哈萨克斯坦”。

expansionism

n. 膨胀主义，扩张主义；

例句
Soviet expansionism was considered a real threat.
苏联的扩张主义被认为是真正的威胁。

was

v. 用来表示某人或某物即主语本身，用来表示某人或某物属于某一群体或有某种性质（ be的过去式 ），在，存在，不受干扰；

例句
There was a terrible sadness in her eyes...
她眼神中流露出深深的悲伤。

considered

adj. 经过仔细考虑的，经过深思熟虑的，受尊敬的，经过深思熟虑的看法；v. 考虑( consider的过去式和过去分词)，想，注意，看重；

例句
Black was considered inappropriate because of its associations with death.
不宜用黑色，因为它让人联想到死亡。

real

adj. 真的，真实的，现实的，事实上的，真诚的；adv. 真正，实在，确实地；n. 实在，现实，实数；

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

threat

n. 威胁，恐吓，凶兆；

例句
The threat is likely to remain in abeyance until next year's meeting in Reykjavik.
这一威胁很可能会一直存在下去，直至明年的雷克雅未克会议。