developing

Compared meaning: a country with low development (adjective).

比较义项：经济欠发达、仍处在发展进程中的（国家或地区）（形容词）。

• developing 本词

  The current, diplomatic and fairly neutral term for a country or region still building its economy; it frames the situation as ongoing progress, and is the standard word in formal, political and economic writing (e.g. "developing nations").

  这是如今用来描述国家或地区经济仍在建设中的通用、较委婉中性的说法；它把情况描述为正在进步的过程，是正式、政治和经济文本中的标准用词（如developing nations）。

  Developing countries are working hard to build stronger economies and modern infrastructure.

  发展中国家正在努力建设更强大的经济和现代化的基础设施。

• underdeveloped

  A blunter, more negative word that stresses what a region still lacks, such as basic infrastructure or industry, rather than the progress being made; it can sound outdated or judgmental and is used less in formal or diplomatic contexts.

  这个词语气更直接、更消极，强调一个地区仍然缺乏的东西（如基础设施或工业），而不是正在取得的进步；听起来可能显得过时甚至带评判意味，正式或外交场合中已较少使用。

  Poor roads and unreliable electricity are still common in underdeveloped areas.

  在经济欠发达地区，糟糕的道路和不稳定的电力供应仍很常见。

Developing and underdeveloped both describe a country with low economic development, but differ in tone. Developing is diplomatic and neutral, framing it as ongoing progress. Underdeveloped is blunter, stressing what a region still lacks. This does not compare developing as in 'developing a vaccine'.

这两个词都可以形容经济、工业水平较低的国家或地区，容易被学习者混用；但developing强调正在进步、语气委婉中性，underdeveloped强调缺乏应有的发展、语气更直接甚至带负面评判。此处不比较developing用作动词现在分词的其他义项，例如developing a vaccine（正在研发疫苗）。