Because a recent study in mice has found that it's protein, not sugar, that provides the perk.

因为一项最近的研究发现，能使小白鼠亢奋的是蛋白质而非糖份。

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This gives them their taste. If they are harvested too early, they will not have enough sugar.

VOA: special.2009.02.24

Take the yolks and mix them in with the sugar and water No. Sugar and flour I guess is probably what I want, sugar and water is not going to do anything interesting for me here mix them into something else.

将蛋黄取出,把他们和上糖和水,不，我猜糖和面粉才可能是我想要的，糖和水没法儿为我,变出有趣的东西来,把他们混合成别的什么东西。

麻省理工公开课 - 计算机科学及编程导论课程节选

Usually when people drink milk they're not thinking that they're consuming sugar but they are.

通常当人们喝牛奶时,人们不会认为他们摄取了糖类,但事实上是他们确实摄取了

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

We are ready to import oil from Saudi Arabia but not sugar from Brazil.

CENTERFORSECURITYPOLICY: Wanted: A real energy security bill

Each morning, fleets of cobalt blue boats still head out from port, scattering across a vast Atlantic horizon - but now the daily haul is sea bass, not sugar.

BBC: Morocco��s best for coastal retreats: Essaouira

Overall sales did decline by about 1% with the worst of the declines coming from the key US market, and excluding parts, actual bike sales dropped 5.5% worldwide and 8.4% in the U.S. Despite the declines, Harley management is heartened by the moderating pace, yet they are not sugar coating the reality of the situation.

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