形容词
银行兑换钱币
1. infrequently exposed to
e.g. feet unused to shoes
2. not in active use
e.g. the machinery sat idle during the strike
idle hands
Synonym: idle
3. not yet used or soiled
e.g. a fresh shirt
a fresh sheet of paper
an unused envelope
Synonym: fresh
4. not yet put into use
e.g. we bought an unused car for a change