| 自然数集 | zi4 ran2 shu4 ji2 | natural numbers' sequence |
| 自然条件 | zi4 ran2 tiao2 jian4 | natural conditions |
| 自然的规律 | zi4 ran2 de5 gui1 lv4 | natural law |
| 自然科学领域的专家学者 | zi4 ran2 ke1 xue2 ling3 yu4 de5 zhuan1 jia1 xue2 zhe3 | experts in the natural sciences |
| 自然语言分析系统 | zi4 ran2 yu3 yan2 fen1 xi1 ji4 tong3 | natural language analysis system |
| 自然铜 | zi4 ran2 tong2 | chalcopyrite |
| 艾登堡 | ai4 deng1 bao3 | Attenborough (name) |
| 阅微草堂笔记 | yue4 wei1 cao3 tang2 bi3 ji4 | The Thatched Study of Close Scrutiny |
| 非自然 | fei1 zi4 ran2 | occult |
| 食色性也 | shi2 se4 xing4 ye3 | By nature we desire food and sex. |
| 水到渠成 | shui3 dao4 qu2 cheng2 | lit. where water flows, a canal is formed (idiom) |
| 顺产 | shun4 chan3 | safe delivery |
| 国家自然历史博物馆 | guo2 jia1 zi4 ran2 li4 shi3 bo2 wu4 guan3 | National Natural History Museum |