Collins Chinese Dictionary Plus (3rd edition), 2011:
自然 zìrán
I 名
nature
II 形
natural
- 自然免疫 zìrán miǎnyì natural immunity
- 表情自然 biǎoqíng zìrán natural expression
III 副 naturally
- 你对(對)他那么(麼)冷淡,他自然不会(會)再来(來)了。 Nǐ duì tā nàme lěngdàn,tā zìrán bù huì zài lái le. Since you were so cold to him, he naturally won't want to come again.