weak solution的用法和樣例：
例句
- "A sweet temper" is a figurative expression, but "sweet coffee" is not.
"甜蜜的性情"是個比喻的說法，而"甜咖啡"則不是。 - This is the tendency for water to pass through a membrane separating a weak solution from a strong one.
滲透是一種水通過膜的運動趨勢，膜的兩面分別是濃溶液和稀溶液。 - A new formula was suggested to express the concentration-dependence of dilute solution viscosity of polydisperse polymer.
最後得到一個新的多分散高分子的稀溶液粘度與濃度的關係式。
