单词	iris diaphragm
释义	iris diaphragm noun : an adjustable diaphragm of thin opaque plates that can be turned by a ring so as to change the diameter of a central opening usually to regulate the aperture of a lens (as in a camera or microscope)
随便看	tenorman tenoroon tenor violin tenosynovitis tenotome tenotomist tenotomize tenotomy tenour tenpence tenpenny tenpenny tenpenny nail ten-percenter tenpin tenpounder tenrec tenrec tenrecidae ten-ring tens tens TENS tens digit tense

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