Something strange is happening. Salt doesn't taste salty. That salt was from sis-in-law. And then there's a constant sour taste in my mouth. Especially after eating carbohydrates. Even after rinsing with salt water, I still taste sour. (T_T)
超音波を交差して特定の場所へ人間に聞こえる音を届ける技術が登場
1 hour ago
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