Japanese ships

The speaker briefly mentions their usual practice, indicating that they typically refrain from a certain action.

What is the main focus of the introduction section?

• Describing a historical event

• Introducing the speaker's usual behavior

• Explaining a complex theory

• Discussing a new topic

Why does the speaker mention they don't usually do something?

• It is against the rules

• Because it is too difficult

• Due to personal preference

• It is not relevant to the topic