Reflective material is made from high refractive index glass beads and a special synthetic resin through a combination of complex processes.

反光材料是由高折射率的玻璃微珠和特殊的合成树脂通过复杂的工艺组合而成的。

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If water had a negative index of refraction, then a straw placed in a glass would appear to bend back under itself.

如果水具有负折射率，那么放在玻璃杯中的吸管似乎可能弯曲到自身下方。

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This is tricky, but you have to hold the spoon handle between your index and middle fingers, against the edge of the glass opposite your mouth.

这不太容易，你得用无名指和中指握住勺把，贴住嘴唇对面的杯沿。

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Whichever theory you think is right, with the No Glass Ceilings motif index, which returned 10.1% year to date, you get a litmus test for this tectonic sociological shift occurring in our society and economy through the progress of 19 companies currently headed by female chief executives.

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When light travels through glass, it slows down (the amount it slows is measured by a number called the refractive index).

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