In order to understand the actual condition of this company, we need to investigate more deeply.

In the ecosystem of this area, 'inquilinism', where certain species parasitize the nests of other species, is common.

In Japan, the system of different surnames for married couples is not yet recognized.

The dredging work of this lake will start from next week.

Kaku is my best friend.

He is proficient in calculating quadrature in astronomy.

He is struggling to understand the ablative case in Latin.

The sum of one angle of this triangle and its complementary angle is 90 degrees.

I have confirmed your reservation.

I have confirmed your reservation.