因为暴露在空气中，所以在糖浆的表面，形成了一层薄膜。
Because a thin film has formed on the surface of the syrup due to its exposure to air.
奥布里：这种糖浆可以将蛀牙的形成减少50%到70%，取决于孩子们吸收了多少。
Aubrey: the syrup reduced the development of cavities by fifty to seventy percent, depending on how much kids received.
但将其搅拌后，这种“水”溶液就会变得像糖浆一样粘稠，粘附在玻璃棒上，形成细如发丝的长丝。
But when it is stirred, the "water" turns out to be as sticky as molasses, clinging to a glass rod and forming long, hair-thin threads.
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