weak solution的用法和样例：
例句
- "A sweet temper" is a figurative expression, but "sweet coffee" is not.
"甜蜜的性情"是个比喻的说法，而"甜咖啡"则不是。 - This is the tendency for water to pass through a membrane separating a weak solution from a strong one.
渗透是一种水通过膜的运动趋势，膜的两面分别是浓溶液和稀溶液。 - A new formula was suggested to express the concentration-dependence of dilute solution viscosity of polydisperse polymer.
最后得到一个新的多分散高分子的稀溶液粘度与浓度的关系式。
