This two-way communication system can send and receive data.

Let's roll the dice and decide the next action.

This problem cannot be solved unless both sides cooperate.

The study of crystal classes is an important part of mineralogy.

This substance has the properties of a crystalloid.

Understanding crystal habit is important in understanding the characteristics of minerals.

This mineral has a very clear crystal zone.

This twin crystal has a very unusual shape.

Sho-yun is my best friend.

In this experiment, we will observe crystallization from the solution.