He chose to serve a second master by working hard.

Our project is scheduled to be completed on the twentieth day of the month.

The Triassic period is one of the geological ages, referring to the period from about 252 million years ago to about 251 million years ago.

I accidentally dropped the eye drops from the second floor.

He trains his biceps at the gym every day.

Binary operation is one of the basic concepts in algebra.

This two-dimensional array represents students in each row and subjects in each column.

Silicon dioxide is a major component of glass and ceramics.

He was affected by secondary effects.

I learned the meaning of 'ichi ni ten' in the classical Japanese class.