古代希腊的哲学家泰勒斯认为万物起源于水,这并不是没有根据的。要知道,我们所居住的地球表面有71%是被水所复盖着的,所以地面上最丰富的物质就要算是水了。现代科学也认为最早的生命形态是由水中产生的。各种生物体中平均含有80%的水,可以说没有水就不会有生命。正是由于水是最普遍的东西,所以我们常用水来作各种量度的标准。例如摄氏温标是用水的沸点(100 Thales, an ancient Greek philosopher, believed that everything originated from water. This is not unfounded. You know, 71% of the surface of the earth we live in is covered by water, so the most abundant material on the ground is water. Modern science also believes that the earliest forms of life were created by water. With an average of 80% of water in various organisms, it can be said that there will be no life without water. It is because water is the most common thing, so we use water to make all kinds of measurements. For example, the Celsius temperature scale is the boiling point of water (100