This old book has severe bookworm damage, making it difficult to read.

This flower is entomophilous, relying on bees and butterflies to carry pollen.

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.

A decision tree is a part of machine learning and a model for classifying or regressing data.