What is the meaning of water?

1. A colorless, odorless and transparent liquid: ~ meters. ~ a drop of stone wears through. ~ vent.

2. river: Han ~. Item ~.

3. Rivers, lakes and oceans. ~ library. ~ Li. When the conditions are ripe, things will be completed smoothly. ~ can carry a boat. Bashan involves. It's beside the mountain.

4. Juice: ~ pen. Ink ~.

5. It refers to extra expenditure or extra income. Outside. Fat ~.

6. Number of washes: This dress has been washed two or three times.

7. Last name.

Water (chemical formula: h? O) It is an inorganic substance composed of hydrogen and oxygen, and it is nontoxic. At normal temperature and pressure, it is a colorless and odorless transparent liquid, which is called the source of human life. Water includes natural water (rivers, lakes, atmospheric water, seawater, groundwater, etc.). ) (containing impurities), distilled water is pure water and artificial water (water obtained by combining hydrogen atoms and oxygen atoms through chemical reactions). Water is one of the most common substances on the earth, an important resource for all life, including inorganic compounds and human beings, and the most important component of organisms. Water plays an important role in the evolution of life. It is a kind of non-renewable resources in a narrow sense and renewable resources in a broad sense. Pure water can conduct electricity, but it is very weak (conductivity can be ignored in daily life) and belongs to extremely weak electrolyte. Due to the dissolution of other electrolytes, there are more positive and negative ions in water in daily life, and its conductivity is enhanced.