I am studying the philosophy of Guanzi.

The male reproductive organs include the vas deferens.

She was told by the doctor that it is difficult to get pregnant due to a problem with her fallopian tubes.

The drainpipe is clogged and the water won't flow.

The exhaust pipe of my car has broken.

The Paleogene period was a very important time in the history of the Earth.

I am planning to go to Inner Mongolia, an autonomous region of China, next week.

I have been to Outer Mongolia.

I have been to Chicago.

This is my unused camera.