He is deeply involved in the study of the meridian system.

We use this coordinate system to locate the position of an object.

In physics, the inertial frame of reference is a very important concept.

This system is very complex.

Paleoecology is a field of study that investigates the relationship between past organisms and their environment.

He is an expert in paleoecology, pouring his passion into studying past ecosystems.

There is beautiful ruscus bamboo growing in my garden.

The glans penis of a male is part of the erogenous zones, and is particularly known to be sensitive.

By regularly checking the key performance indicators, you can understand the performance of the company and devise improvement measures.

She started doing yoga to balance her autonomic nervous system.