rutting

动词 rut:

1. be in a state of sexual excitement; of male mammals
   同义词：rut
2. hollow out in the form of a furrow or groove
   同义词：furrow, rut, groove

1. After being a bus driver for30 years, Jed finds himself in a rut.
   在当了30年汽车司机后杰特觉得自己的工作单调乏味。
2. Environment can sometimes alter the rut age of an animal.
   有时环境可以改变动物发情的年龄。