The Marco Polo Bridge Incident was the trigger for the Sino-Japanese War.

He got involved in a love affair.

This is the most difficult case I have ever faced.

The labor cost of our project significantly exceeded the budget.

He is one of the main producers in this region.

When my stomach hurts, I always take an antacid.

This year's output increased by 20% compared to last year.

He conducted an experiment using potassium cyanide.

This factory has introduced the latest machines for mass production.

We will use cyanide in this chemical experiment.