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| Chinese | English |
| 弱光照生境 | low light habitat |
| 弱势群体 | underprivileged people A segment of the population that does not have access to the rights or benefits granted to the rest of society, often because of low economic or social status (往往是因为经济或社会地位低而无法获得社会其它人所拥有的权利或利益的一部分人群。) |
| 弱可降解物质 | weakly degradable substance A substance that is not easily converted to another, usually less complex compound (该物质不容易转换为另一种物质，通常是不太复杂的化合物。) |
| 脆弱生态系统 | fragile ecosystem |
| 脆弱的物种IUCN, 不采取保护性措施有可能变为濒危的物种。 | vulnerable species IUCN, Species which is likely to become endangered unless protective measures are taken |