His batting eye is amazing.

The sphericity of this object is very high.

We should always remember the power of Kannon in difficult times.

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.

He drew a straight line using a T-square.

She is learning the grammar of the present progressive form.

He is good at reading Simplified Chinese.

The pineal gland, or 松果體, is a part of the brain that secretes hormones.