约 4,990,000 个结果
Environment Definition & Meaning - Merriam-Webster
Environment | Conservation, Ecology & Sustainability | Britannica
The Planet - National Geographic
ENVIRONMENT | English meaning - Cambridge Dictionary
Natural environment - Wikipedia
Environment Definition & Meaning | Britannica Dictionary
Ecosystem | Definition, Components, Examples, Structure, & Facts
Environment - Definition, Meaning & Synonyms - Vocabulary.com
environment - Oxford Learner's Dictionaries
12 Types of Natural Environments (Examples) - Wildlife Informer