在白色石灰石和粉灰色石灰石之间是一层薄薄的黏土。
Between the white limestone and the greyish pink limestone is a thin bed of clay.
在粉纸上特别显著的灰色或斑点状情况。这是砑光机上的过度热力或压力所造成的纸张故障。
Bruising a grey or mottled effect, most noticeable in coated papers. It is a paper defect caused by undue heat or pressure in the calendars.
尽管宽吻海豚通常是灰色的，这只极为罕见的宽吻海豚却因为是白化变种而没有色彩——除了兴奋时会变粉。
Although bottlenose dolphins (Tursiops) are usually grey, this extremely rare creature is an albino and has no colouration - apart from a tendency to turn pink when feeling flushed.
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