通常在果核的颜色上会有一些变化，从绿色向黄色的转变标志着葡萄已开始进入生理成熟期，那时正是丰收的最佳时机。

There's a change in the colour of the pips that marks the onset of physiological ripeness, from green to yellow, which is the critical point at which to harvest.

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对12个水稻品种生理成熟期的产量和叶型特征进行典型相关分析，结果表明：产量与叶型特征各性状的典型相关系数均达显著或极显著水平。

This paper presents the result of canonical correlation analysis between leaf characters and yield of 12 paddy rice cultivars measured during the physiological maturing stage.

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结果表明，在玉米生理成熟期地上第二茎间髓部组织内蔗糖的含量与玉米对茎腐病的抗性密切相关，抗病的玉米杂交种的蔗糖含量明显高于感病的玉米杂交种。

Corn hybrids resistant to stalk rot had higher sucrose contents in the pith tissues of the second internode above the ground than hybrids susceptible to the disease.

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