ootheca

例句：

1. 1. The othetacian is the only one who can solve this problem.
   唯一能解决这个问题的是这位专家。
2. 2. The othetacian has a lot of experience in this field.
   这位专家在这个领域有很多经验。
3. 3. The othetacian's work has greatly improved our lives.
   这位专家的工作极大地改善了我们的生活。