SENTENCE A
How much solute is dissolved in the same amount of water is called concentration.
같은 양의 물에 용질이 얼마나 많이 녹아 있는지를 농도라고 해요.
SENTENCE B
If a lot of solute is dissolved, the concentration is high, and if a little is dissolved, the concentration is low.
용질이 많이 녹아 있으면 농도가 높고, 적게 녹아 있으면 농도가 낮아요.