Two candles have different lengths and different thicknesses.

两根蜡烛长短粗细都不一样。

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Different stroke widths produce lines of different thicknesses.

不同的笔画宽度会产生不同粗细的线条。

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Thin films are widely used in MEMS with different thicknesses from micron, sub-micron to nanometer scale.

MEMS中大量使用薄膜材料，厚度可达微米、亚微米直至纳米量级。

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Lenses, for example, focus light by allowing it to pass through different thicknesses, thereby slowing it down by differing amounts.

BBC: A Bose-Einstein condensate: It slows down light