cry wolf

基本解釋

Don't cry wolf unless you really need help.
意思是：除非你真的需要幫助，不然不要發(fā)“狼來(lái)了”的假警報(bào)。
To cry wolf is to give false alarm. It comes from the fable of the shepherd boy who often called "wolf" to make fun of the neighbors.
喊狼來(lái)了就是發(fā)假警報(bào)。它來(lái)源於一個(gè)牧童的寓言。他經(jīng)常喊狼來(lái)了，以此捉弄鄰居。
blog.sina.com.cn
“I don’t want to cry wolf on this, ” said Dr. John M. Kittelson, a professor in the Department of Biostatistics and Informatics at the University of Colorado Denver.
科羅拉多丹彿大學(xué)生命統(tǒng)計(jì)及信信息學(xué)院的教授凱特林博士說(shuō)：“我可不想儅喊狼來(lái)了的那個(gè)家夥。”

Trade-liberalisation rounds are arcane affairs about which free-traders are often thought to cry wolf.
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Like the boy in the cry-wolf fable, you just get to a point where no one believes you.
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to keep asking for help when you do not need it, with the result that people think you do not need help when you really need it