| 气矿井 | qi4 kuang4 jing3 | natural gas mine |
| 油气资源 | you2 qi4 zi1 yuan2 | natural gas resources |
| 浙江天然 | zhe4 jiang1 tian1 ran2 | Ahejiang Natural Holding Ltd |
| 煤气罐 | mei2 qi4 guan4 | natural gas pipe |
| 生态环境建设 | sheng1 tai4 huan2 jing4 jian4 she4 | construction of a natural environment |
| 移民和归化局 | yi2 min2 he2 gui1 hua4 ju2 | Immigration and Naturalization Agency |
| 自然死亡 | zi4 ran2 si3 wang2 | natural death |
| 自然淘汰的原则 | zi4 ran2 tao2 tai4 yuan2 ze2 | principle of natural selection |
| 自然环境 | zi4 ran2 huan2 jing4 | natural environment |
| 自然语言处理 | zi4 ran2 yu3 yan2 chu3 li3 | natural language processing |
| 自然资源与环境部 | zi4 ran2 zi1 yuan2 yu3 huan2 jing4 bu4 | Ministry of Natural Resources and the Environment |
| 自然遗产 | zi4 ran2 yi2 chan3 | natural heritage |
| 英国天然气公司 | ying1 guo2 tian1 ran2 qi4 gong1 si1 | BRITISH GAS |