Her son is a very excellent student.

This is an action that does not follow precedent.

Cold water is the best on a hot day.

Please refer to this example.

This apartment does not require a key money.

This layout is very easy to use.

Every year, a special festival is held at this shrine.

This is the common method.

This is a situation that is different from the common case.

In the organic chemistry experiment, we used phthalein as an indicator.