black economy

black economy的音标为[blæk"iːkəʊnɪt] ，基本翻译为“黑色经济”，速记技巧为：黑=black，经=economy。

Black economy这个词的英文词源可以追溯到拉丁语“niger”，意为黑色或暗色。这个词最初用来描述那些非法或不公开的经济活动，因为这些活动通常是不被政府或法律所认可的。

Black economy这个词的变化形式包括“black market”、“underground economy”、“shadow economy”等。其中，“black market”指的是非法交易市场，通常指那些进行非法物品或服务的交易市场；“underground economy”则是指那些在政府监管之外的经济活动，通常指那些非法的或隐蔽的经济活动；“shadow economy”则是指那些未被政府记录在案的经济活动，通常指那些非法的或隐蔽的经济活动。

Black economy这个词在英语中通常用来描述那些非法的、隐蔽的经济活动，这些活动通常不被政府或法律所认可，但却是真实存在的经济活动。这些经济活动对社会的经济稳定和公正性造成了威胁，因此需要得到有效的监管和规范。

常用短语：

1. black market

2. black economy activities

3. underground economy

4. cash economy

5. undeclared economy

6. untaxed economy

7. illegal economy

例句：

1. We need to crack down on the black market activities.

2. The government should encourage a thriving cash economy.

3. The underground economy is a problem that needs to be addressed.

4. The country"s tax revenue is falling due to a weak tax-paying culture in the undeclared economy.

5. Illegal activities are a major contributor to the black economy.

6. The government must take measures to promote a legal and tax-compliant economy.

英文小作文：

The underground economy is a complex phenomenon that affects many aspects of society. It is often characterized by the lack of transparency and accountability, which can lead to various problems such as tax evasion, corruption, and criminal activities. However, it can also provide some benefits such as informal job opportunities and entrepreneurship, and it can foster social connections and trust among individuals. Therefore, it is important to address the issue of the underground economy in order to promote a more transparent and fair economic environment.