The distance between Earth and the Sun is approximately 150 million kilometers, which can be written in scientific notation as 1.5 x 10^8 km.
地球和太阳之间的距离大约是1.5亿公里，可以用科学记数法表示为1.5 x 10^8公里。
In a chemistry class, students learn to express very large or very small numbers using scientific notation.
在化学课上，学生学习使用科学记数法来表达非常大或非常小的数字。