我对这些岩石感到惊奇，它们是经过几百万年的沉积而形成的，层次分明，当大峡谷从谷底开始渐渐沉人黑暗的时候，我发现岩石居然在变换颜色。
It was amazing the way the rocks, compressed into distinct layers over millions of years, changed colors as the canyon darkened from the bottom up.
改善了颜色标记，便于组件的辨识和装配，即使是在黑暗的手术室里也能做到。
Improved colour coding for easier recognition and allocation of the components - even in the darkened operating theatre.
改善了颜色标记，便于组件的辨识和装配，即使是在黑暗的手术室里也能做到。
Improved colour coding for easier recognition and allocation of the components - even in the darkened operating theatre.
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