1. Water will boil first and then freeze in a vacuum.

2. When steaming buns and dumplings, the ones in the upper steamer will cook first, while those in the lower steamer will cook later.

3. Kumquats are eaten with the peel on.

4. In the movie "Minions", Bob's two eyes have different pupil colors.

5. The main component of natural gas is methane, which is colorless and odorless. However, odor indicators are added to the piped natural gas used in homes, so an odor can be smelled when there is a leak.

6. The "mud" in "completely drunk" does not refer to soil, but to a type of insect that lives in the South China Sea. This insect has no bones and becomes "drunk from dehydration" as soon as it comes ashore.

7. CHATELDON – the world’s most expensive water, enjoyed by royalty and nobility, originated in 1650 when King Louis XIV of France drank it.

8. April 30th is "International No Spanking Day." This day was first initiated in 1998 by the Center for Effective Discipline, an anti-corporal punishment organization in the United States. Its purpose is to promote the concept of children's human rights against corporal punishment and to raise social awareness.

9. A light-year is a unit of distance, not a unit of time.

10. The custom of eating apples on Christmas Eve is unique to China because the word for apple sounds like "peace fruit" in Chinese, which is related to the idea of ​​peace and safety.