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KK:
[`ɑpʃәnḷ]
DJ:
[`ɔpʃәnәl]
adj.
1.
随意的; 非必须的
n.
1.
选修科目
同义:
adj.
自愿的, 志愿的
voluntary
elective
反义:
adj.
随意的; 选修的
compulsory
反义参见:
required
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ring
ring
ring-a-ding
ring back
ringback tone
ring binder
ringbolt
ringdove
ringdown signaling
ringed
ringent
ringer
Ringer's solution
ring fence
ring finger
ringhals
ring head
ringing
ringingly
ring interface adapter
ring latency
ringlead
ringleader
unidentified
unidentified flying object
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更新时间:2024/11/5 22:37:53