她发出危险的信号。用英语怎么说？

她发出危险的信号。

She sounded a note of danger.

she

pron. 她，它；

例句
Her lover walked out on her after she had aborted their child.
她的情人在她打掉胎儿后甩了她。

sounded

v. （使）发出声音，响( sound的过去式和过去分词 )，发（音），试探，探测；

例句
He sounded abject and eager to please...
他低声下气，急于讨好别人。

note

n. 笔记，便笺，音符，钞票；vt. 注意，记录，对…加注释，指出；

例句
Try making a note of the things which annoy you...
试着把烦心事写下来。

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。

danger

n. 危险，危险物，威胁；

例句
Many schools were in danger of closing because the children were bused out to other neighborhoods.
很多学校面临倒闭的危险，因为学生被校车送到其他社区就读了。