We shouldn't cry for the moon.

不能要求不可能得到的东西。

He was a mere child in the world, but he didn't cry for the moon.

他在这世上只不过是一个小孩子罢了，可是，他没有哭着要月亮。

Don't cry for the moon. The only way to get a good grade in the exam is to work hard.

不要抱存幻想了。想考得好成绩，唯一的途径是用功读书。

Cry for the moon: He asked his dad to buy him a yatch as a birthday present. I think he was asking for the moon.

他要他爸爸给他买一艘游艇作为生日礼物,我想他真是异想天开了。

The call for free trade is as unavailing as the cry of a spoiled child in its nurse's arms for the moon or the stars that glitter in the firmament of heaven.

要求自由贸易就像宠坏的小孩在他保姆的怀中哭喊着要天上闪光的月亮或星星一样徒劳无益。