YSK: If you want to make sure your egg is hard boiled before you crack it open you can spin it on a flat surface.
from /r/YouShouldKnow
YSK:如果你想在敲開雞蛋之前確保它是硬的,你可以在一個平面上旋轉它。
YSK:如果你想在敲開雞蛋之前確保它是硬的,你可以在一個平面上旋轉它。
YSK: If you want to make sure your egg is hard boiled before you crack it open you can spin it on a flat surface.
from /r/YouShouldKnow