Fresh water (water that contains little or no salt), such as river or lake water—not sea water.
この池には淡水魚がたくさん住んでいる。
Many freshwater fish live in this pond.
淡水の確保は災害時に重要だ。
Securing fresh water is important during disasters.
淡水と海水では生息する生物が違う。
Different organisms inhabit fresh water and seawater.