The shape of this crystal lattice is very unique.

This salt contains water of crystallization.

He is an expert in crystallography.

The government declared a state of emergency to prevent the spread of the new coronavirus.

The passive form in Japanese is used differently from English.

This quadrilateral is a square.

By learning the imperfective form, you can understand Japanese grammar more deeply.

Please tell me the singular form of this word.

In English, adding 's' after a noun makes it a plural form.

In Japanese grammar, the hypothetical form is one of the inflectional forms of verbs.