我有三件一模一樣的襯衫——款式、尺寸和圖案都完全相同。

為了確保三件襯衫的清洗頻率一致，我每次穿完後都會先把它們放在待洗籃裡，不馬上洗。等它們都放進籃裡後，我再一起洗。

這樣，我就能保證它們的清洗頻率是一致的。

I have three identical shirts—the style, size, and pattern are exactly the same.

To ensure that all three shirts are washed at the same frequency,  I leave them in the waiting-to-be-washed after each use without washing them immediately. Then, I wash them all , once they were all in the bin. 

This way, I can guarantee they'll get clean at the same frequency.