There wasn't so much as a speck of dirt anywhere.
到处都见不到一丝灰尘(到处都一尘不染)。
I've got a foreign body (eg an insect or a speck of dirt) in my eye.
我眼中有异物(如小虫或灰尘)。
They are sometimes finicky; a smudge of dirt or a speck of dust can cause bogus readings and change the calculated results.
这类装置有时是相当敏感的，上面稍稍有些污点或灰尘就会引起读数的变化，从而改变计算的结果。
They are sometimes finicky; a smudge of dirt or a speck of dust can cause bogus readings and change the calculated results.
这类装置有时是相当敏感的，上面稍稍有些污点或灰尘就会引起读数的变化，从而改变计算的结果。
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