Retort food is very convenient and has a long shelf life.

We should know what to do when a catastrophe occurs.

Our town suffered significant damage due to a natural disaster.

He injured his arm in a workplace accident.

This algorithm was developed for optimization.

We need to optimize this process.

It is difficult to find the optimal solution to this problem.

Please use the emergency stairs in case of a fire.

Due to the earthquake, the city declared a state of emergency.

When will you go to Japan?