1.
Dark clouds denote rain.
乌云是下雨的预兆。
2.
This sign presages rains.
这种迹象是下雨的预兆。
3.
a watery moon,sun,sky
预兆要下雨的月光、阳光、天空.
4.
A mackerel sky is a sure sign of rain to come.
天空出现稀薄的排状斑纹云，那预兆天要下雨了。
5.
"It's raining, it's raining. That's a good omen, it means you will thrive from now on.
“下雨了，下雨了，这是你们家里此后会有滋长的预兆。”
6.
The clouds brought a threat of rain.
阴云带来要下雨的征兆。
7.
Black clouds are an unmistakable sign of coming rain.
乌云是下雨的明显前兆。
8.
Those clouds indicate rain.
那些云是下雨的前兆。
9.
The dark clouds mean rain.
乌云是下雨的征兆。
10.
a heavy dark cloud presaging rain or a storm.
预兆雨或暴风雨的沉重的黑云。
11.
the pride of the morning
早晨的雾或阵雨(天晴的预兆)
12.
An omen or foreboding, especially of evil.
预示，预兆，凶兆预兆或凶兆，尤指不幸的
13.
"boding:an omen or foreboding, especially of evil."
预示,预兆,凶兆:预兆或凶兆,尤指不幸的。
14.
without any warning,
在毫无预兆的情况下，
15.
There is a threat of rain in the dark sky.
黑云密布的天空有下雨的兆头。
16.
Those black clouds forebode rain.
那些乌云是要下雨的前兆。
17.
Those black clouds are a sure sign it's going to rain.
那些乌云是天要下雨的可靠征兆。
18.
The air held a foretaste of rain.
空气中有将要下雨的征兆。