Can you imagine young people nowadays making a study of trigonometry for the fun of it? Well I did.
- Tác giả: Clyde Tombaugh
Đăng ngày: bởi
vi https://danhngon.net/danh-ngon-977/ 2020-11-21T22:49:42+07:00 Danh ngôn Cuộc sống DanhNgon.Net https://danhngon.net/