The horse does not just represent energy, high spirits, prosperity, development, but also stands for a national spirit of struggling on without stopping, and of striving on without giving up.
Mandarin
尽管美国是个发达国家，却还有些很贫穷的人。
儘管美國是個發達國家，卻還有些很貧窮的人。
jǐn guǎn měi guó shì gè fā dá guó jiā ， què hái yǒu xiē hěn pín qióng de rén 。
Even though America is a developed country, it still has some very poor people.
Even though the United States is a developed country, it still has some very poor people.
Mandarin
因为缺乏的政府的关注，这个区域还不发达。
因為缺乏的政府的關注，這個區域還不發達。
yīn wèi quē fá de zhèng fǔ de guān zhù ， zhè ge qū yù hái bù fā dá 。
This area is still underdeveloped because of a lack of interest from the government.
Since you opened a grocery store in such a small housing estate, you'll only do business with the same group of people, therefore you'll never become wealthy.
You always have a sharp wit, no wonder you are rich.
Examples (Wiktionary)
Mandarin
不发达地区
不發達地區
bù fā dá dì qū
underdeveloped area
Cantonese
发达啦！
發達啦！
faat3 daat6 laa1!
I'm/we're rich!
Mandarin
“秀才不出门，全知天下事”，在技术不发达的古代只是一句空话，在技术发达的现代虽然可以实现这句话，然而真正亲知的是天下实践着的人，那些人在他们的实践中间取得了“知”，经过文字和技术的传达而到达于“秀才”之手，秀才乃能间接地“知天下事”。
“秀才不出門，全知天下事”，在技術不發達的古代只是一句空話，在技術發達的現代雖然可以實現這句話，然而真正親知的是天下實踐着的人，那些人在他們的實踐中間取得了“知”，經過文字和技術的傳達而到達於“秀才”之手，秀才乃能間接地“知天下事”。
“ xiù cái bù chū mén ， quán zhī tiān xià shì ” ， zài jì shù bù fā dá de gǔ dài zhǐ shì yī jù kōng huà ， zài jì shù fā dá de xiàn dài suī rán kě yǐ shí xiàn zhè jù huà ， ｒáｎéｒ zhēn zhèng qīn zhī de shì tiān xià shí jiàn zhe de rén ， nà xiē rén zài tā men de shí jiàn zhōng jiān qǔ dé le “ zhī ” ， jīng guò wén zì hé jì shù de chuán dá ér dào dá yú “ xiù cái ” zhī shǒu ， xiù cái nǎi néng jiàn jiē de “ zhī tiān xià shì ” ．
The saying, “without stepping outside his gate the scholar knows all the wide world's affairs”, was mere empty talk in past times when technology was undeveloped. Even though this saying can be valid in the present age of developed technology, the people with real personal knowledge are those engaged in practice the wide world over. And it is only when these people have come to “know” through their practice and when their knowledge has reached him through writing and technical media that the “scholar” can indirectly “know all the wide world's affairs”.