He suddenly vanished.

Estradiol is a type of female hormone, mainly produced in the ovaries.

He discreetly swapped my wallet.

Liquid nitrogen is very cold, so care must be taken when handling it.

He is a world-famous geographer.

A spell checker is installed on my computer.

Projective geometry is a branch of mathematics that studies geometric objects such as points, lines, and planes and their relationships.

My new light vehicle is fuel-efficient and very convenient.

Tonji is my best friend.

He attended a gathering of Sherlockians.