This is the 3161st most frequent Chinese word.
亚
"亚" means "second," "Asia," or "sub-," often indicating something inferior or secondary.
In this sentence, '亚' means 'sub-', indicating a subset or secondary category, as used in '亚热带' (subtropics).
这项研究属于亚热带生态学的范畴。
This research falls under the category of subtropical ecology.
Here, '亚' means 'second' or 'runner-up', as used in '亚军' (second place).
这场比赛中，他获得了亚军。
In this competition, he won the second place.
'亚' represents 'Asia-', as part of the term '亚太地区' (Asia-Pacific region), indicating geographical context.