A standard one. Replacement during the first year if all rules for proper use have been followed.
有一个原则,如果在一年内符合各种使用规定,就可更换。
For his lifentime's work in studying the communication of animals, including honey bees, Professor Karl von Frisch was given a Nobel Prize in 1973, which he shared with two other scientists. He died in 1982.
由于卡尔·冯·弗里施教授一生都在研究蜜蜂在内的动物之间信息的传递,他和另外两位科学家在1973被授予一项诺贝尔奖。他于1982年去世。