This mineral is called anhydrite.

This apple is very hard.

Pronouncing the palatal sounds in Japanese is difficult.

He trains every day with a bokken.

Fir trees beautifully color the winter landscape.

Various colorful shrubs are planted in my garden.

Kimiko is my best friend.

He continues to hone his calligraphy skills.

Mr. Iriki is my best friend.

Understanding the algorithm of the regression tree is difficult.