英语语法分析

Latex is firm and has excellent support, but not everyone likes its "springiness."

乳胶稳固并且有很好的支撑力，但不是所有人都喜欢它的轻快。

A few addition of gelatin decreased the hardness of mixed gel, but improved the springiness.

少量添加明胶降低了混合凝胶的硬度，但却改善了凝胶的弹性；

This patented design gives it just the right weight and springiness to bounce on water and not sink.

这个专利设计刚好给予了此球恰到好处的重量和弹力，以便球可在水上跳起而不下沉。