Learning on 04/21/2026
資産除去債務Apr 20, 2026, 10:18:49 PM
Study time: 53 seconds
Today's learning: 3
Consecutive study days: 2
Difficult review: 1
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Apr 20, 2026, 10:18:49 PM
Study time: 53 seconds
Today's learning: 3
Consecutive study days: 2
Difficult review: 1