developing + nation/economy
指经济或社会处于发展阶段的国家
developing nation
发展中国家
显影
发展的过程；对感光材料进行加工以使影像显现的过程
the process of making an image visible by treating exposed photographic film or paper with chemicals
指胶片或照片的冲洗显影，不是“发展中的”。
发展的过程
A process of development.
对感光材料进行加工以使影像显现的过程
processing a photosensitive material in order to make an image visible
Developing film in a darkroom is a delicate process.
在暗房里冲洗胶片是一个精细的过程。
用法提示：这里的 developing 是动名词，作主语，意为“冲洗（胶片）”。
I bought a new set of chemicals for developing black-and-white photos.
我买了一套新的化学品，用来冲洗黑白照片。
用法提示：developing 作介词 for 的宾语，表示“显影、冲洗”这个行为。
The developing of these old negatives took the photographer most of the day.
冲洗这些旧底片花了摄影师大半天的时间。
用法提示：developing 是名词，在 the ... of 结构中表示“显影、冲洗”。
指经济或社会处于发展阶段的国家
developing nation
发展中国家
用于冲洗胶片的化学溶液
developing solution
显影液
grammar · medium
易错句子The developing country has a high GDP.
正确表达The developed country has a high GDP.
混淆了'developing'（发展中的）和'developed'（发达的）。'developing'用于描述仍在发展过程中的国家，而'developed'用于描述已经高度发达的国家。此处语境为高GDP，应使用'developed'。
grammar · medium
易错句子The developing of the new drug took years.
正确表达The development of the new drug took years.
误将'developing'（形容词或动词的现在分词）用作名词。'developing'作为形容词或动词时不能直接作主语或宾语，表示'开发'这一概念时应用名词形式'development'。
“developed”表示已经完成发展，而“developing”表示正在发展过程中。
“development”是名词，表示发展的事实或过程；而“developing”是形容词，表示正在发展的状态。
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Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.