The rigidity, tartness and preservation are not bad.

硬度、 锋利度和保持性都非常得不错。

He could smell the pine, the tartness of nearby tree SAP.

他又嗅到松树和附近树汁尖酸的气味。

Were farm workers as lazy as us not to grind sickles to be tartness?

难道农场的工人也和我们一样懒，连镰刀也不磨利点？

The tartness of some wines is due to high concentrations of L-malate.

一些酒的酸味是由于L -苹果酸的高浓度。

These acids give the fruits tartness and slow down bacterial spoilage.

这些酸把水果并减缓细菌酸的性质。