Do you remember where I put my study guide?

Spectroscopy is an important means of investigating the properties of matter.

He is an expert in Classical Chinese text studies, and is good at interpreting ancient Chinese literature.

He is knowledgeable in all fields of learning.

He is widely recognized as an expert in dogmatics.

He is majoring in the study of national law.

He understands the basic concepts of thermodynamics.

The characteristic of annelids is that their bodies are divided into ring-shaped segments.

This butterfly valve is used to control the flow of fluid.

He explained in detail about the structure of the sphenoid bone.