温度过热提高了葡萄的含糖量，可能达到灾难性的浓度。
Excess heat raises the sugar level of grapes to potentially ruinous levels.
糖和酒精：旧世界的葡萄成熟度较低，含糖量较少，因为它们往往种植于较寒冷地区，而新世界葡萄生长于较温暖地区。
Sugar and alcohol: Old World grapes are less ripe and lower in sugar, because they tend to be grown in cooler-weather regions.
这会增加葡萄的含糖量。
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