unbound
01
未绑定的, 自由的
not restrained or tied down by bonds
02
未装订的, 松散的
not secured within a cover
03
未结合的, 自由的
not held together by chemical bonds and are free to move or interact with other substances
例子
The solution contained both bound and unbound ions, which contributed to the chemical reaction.
溶液中含有结合和未结合的离子，这些离子促成了化学反应。
