The rock beneath my head floated up in the air, as light as a feather.
我头下面的石头飘浮到空中，像一根羽毛一样轻。
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If your model has big ears, then turn their head so only one is showing and then feather the light so that the other ear will fall into shadows and not be noticeable.
If you're like many people, shortly after lunch your head begins buzzing, your concentration plummets, your eyes droop and the top of your desk begins to look as cozy as a feather mattress.