知了

例句：

1. 1. The summer heat is so intense that the cicadas are constantly buzzing.
   夏天的炎热使得知了不停地鸣叫。
2. 2. During the long winter, only the cicadas can be heard in the forest.
   漫长的冬天里，只有知了能听到森林里的叫声。
3. 3. The cicadas' song is a reminder of the warm summer days.
   知了的鸣叫提醒着我们温暖的夏日时光。