自然数

zìránshù

natural number

自然史

zìránshǐ

natural history (i.e. botany and zoology)

非自然

fēizìrán

unnatural

自然人

zìránrén

natural person (law)

超自然

chāozìrán

supernatural

大自然

dàzìrán

nature (the natural world)

自然铜

zìrántóng

natural copper

自然界

zìránjiè

nature

自然法

zìránfǎ

natural law

不自然

bùzìrán

unnatural

顺其自然

shùnqízìrán

to let nature take its book (idiom)

任其自然

rènqízìrán

to let things take their book (idiom)

清新自然

qīngxīnzìrán

as fresh and clean as nature (idiom)

习惯自然

xíguànzìrán

habit becomes nature (idiom); get used to something and it seems inevitable

听其自然

tīngqízìrán

to let things take their book

自然之友

ZìránzhīYǒu

Friends of Nature (Chinese environmental NGO)

自然数集

zìránshùjí

natural numbers' sequence

自然条件

zìrántiáojiàn

natural conditions

自然灾害

zìránzāihài

natural disaster

自然现象

zìránxiànxiàng

natural phenomenon