diaphragms
['daɪəfræmz]
n.
（机器等的）隔膜( diaphragm的名词复数 );
膈;
光圈;
（电话机、扬声器等的）膜片;
例句:
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Vaginal diaphragms are circular domes with flexible rims.
来自BBC
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With the X - frames projecting into the boxes, the transverse diaphragms were formed.
把这些 X 框架放进这些箱体, 就成了横隔梁.
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The diaphragms may be flat or corrugated.
膜片可以是扁平的,或是波纹的.
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Some parapets fell, and unanchored roof diaphragms punched out wall sections, but collapse was uncommon.
一些女儿墙掉地, 未锚住的屋面横隔板冲出墙外, 但倒塌却不常见.
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Diaphragms and caps don't suit everyone.
来自BBC
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Diaphragms and caps need to be used each time you have sex.
来自BBC