They announced that a cold wave would come soon.是什么意思？

They announced that a cold wave would come soon.

他们报告说不久寒流就要来。

they

pron. 他/她/它们，人们，大家，政府，当局，她们；

例句
The storms had abated by the time they rounded Cape Horn.
他们绕过合恩角时，暴风雨已经减弱。

announced

v. 宣布（ announce的过去式和过去分词 ），通知，广播，声称；

例句
The subject of the talk is announced a week in advance.
会谈的主题已提前一周宣布。

that

det. 那个，那；pron. 那个，那；conj. 多么，如此…以至，用于某些动词、形容词和名词后，引出各种从句；adv. 不那么，那样；

例句
...expensive make-up that we saw being advertised by a beautiful model...
我们所见的由一位漂亮模特代言的昂贵化妆品

cold

adj. 寒冷的，冷淡的，无情的，失去知觉的，[艺]有冷感的，冷色的；n. 寒冷，感冒，伤风；adv. 完全地；

例句
It was a cold room, but it afforded a fine view of the Old City.
这房间虽然很冷，但是它能让人将古城的景致尽收眼底。

wave

n. 波浪，波动，挥手，涌现的人（或事物），汹涌的行动（或思想）态势；vi. 摇摆，起伏；vt.& vi. （一端固定地）飘扬，挥手指引，挥动…示意，略呈波形；vt. 挥手表示，挥舞，使…略呈波形，烫（发）；

例句
...a crime wave that shows no sign of abating.
丝毫没有减弱迹象的犯罪势头

would

aux. 将，将要，愿意，会，打算，大概；v. (will 的过去式，用于转述)将；

例句
I would love to go abroad this year, perhaps to the South of France.
我今年很想出国，可能是去法国南部。

come

vi. 来，开始，出现，发生；vt. 做，装扮…的样子，将满（…岁）；int. 嗨！；

例句
I've come looking for a bit of advice.
我特来讨教。

soon

adv. 立刻，马上，一会儿，不久，快，宁愿；

例句
The minister advised him to leave as soon as possible...
部长建议他尽快离开。