Sibo fish is a kind of sea fish with very delicious meat. The Japanese want to transport this fish from abroad to their country for sale. However, because the Sipo fish were very unadapted to the transportation environment, almost all of them died when they were shipped to Japan. Someone proposed to put catfish, the natural enemy of Sipo fish, into it, and this trick really worked. Only a few fish were dead when they were shipped to Japan. It turns out that when the Sipo fish encounters a natural enemy, its desire for survival is stimulated and it fights the catfish with all its strength. As a result, it strengthens its adaptability to the environment, and its survival rate naturally increases greatly.

Margaret Thatcher was a world-renowned strong-arm politician. Her father always warned his daughter never to let herself fall behind others. Thatcher took her father's words to heart. She always gets first place in every exam, does the best in club activities, and even tries to sit in the front row when taking a bus. Later, Thatcher became the only female Prime Minister in British history, known as the Iron Lady. It can be seen that if you want to achieve a career, you must have a good sense of competition.