What does it mean to find a plastic ball to interpret dreams?

What's the use of getting a yellow card in table tennis?

The yellow card in table tennis has a warning function, but it does not deduct points.

In the match with Japan, Xu Xin was booked for serving too slowly. Using a towel to wipe sweat casually in a table tennis match will be judged by the referee as deliberate delay, which will lead to a yellow card. Two yellow cards will become a red card, and one point will be directly punished.

Extended data:

The development history of table tennis;

Table tennis originated in England. /kloc-At the end of 0/9, tennis was all the rage in Europe. However, due to the limitation of venue and weather, some college students in Britain move tennis indoors, using the dining table as a table, books as a net, parchment as a racket and playing around the dining table. 1890, several British naval officers stationed in India came across that playing tennis on a small table was quite exciting.

Later, they used solid rubber instead of solid balls, then hollow plastic balls and wooden boards instead of rackets to play this novel "tennis match" on the table, which is the origin of the name table tennis.

Soon after its appearance, table tennis became a popular sport. At the beginning of the 20th century, the United States began to produce complete sets of table tennis equipment. Table tennis is the number one grip sport in the United States, and more than 200,000 Americans play table tennis. At first, table tennis had other names, such as indortennis.

Later, an American manufacturer created the new word "ping-pong" with the sound made when ping-pong was struck. As the registered trademark of his "table tennis" patent, table tennis later became another official name of table tennis. When table tennis was introduced to China, people created a new word-table tennis.

Baidu encyclopedia-table tennis