The robot entered the express "last mile" and…

Recently, it was learned that the "express" robots that can carry three shopping bags of the same weight and even weighing 13 kilograms in one time are being tested in Estonia, Germany and London, England. It is reported that this robot is actually a miniature driverless e.....

What does the color of a birthday candle mean?

Red birthday candle represents 10, blue birthday candle represents 5, white birthday candle represents 1 Birthday Candles In many parts of China, people like to light candles on their birthdays. In ancient times, candles used for birthdays were larger in shape than candles used for.....