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单词
masson disk
释义
WordReference Random House Unabridged Dictionary of American English © 2024
Mas
′
son disk′
(mas
′
ən),
USA pronunciation
a white disk on which a series of concentric gray circles appear to vanish intermittently when the disk is rotated, used for testing a person's fluctuation of attention and visual threshold.
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更新时间:2025/7/23 12:19:09