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"a perforation of the eardrum"
以上来源于: WordNet
N-COUNT Perforations are small holes that are made in something, especially in paper. 小孔 [usu pl]
Tear off the form along the perforations and send it to Sales.
沿着打的孔撕下表格，寄给销售部。
perforation plate 穿孔板；匀浆板
eyelets
The dangerous type chronic otitis media occurs with pars flaccida and marginal perforations.
慢性中耳炎的危险型可出现鼓膜松弛部的穿孔和鼓膜边缘性穿孔。
youdao
The rear perforations are visible on the cut edge.
后方齿孔都是看得见，对切缘。
There are limitations on the number and position of perforations allowed.
允许穿孔的数量和位置上有局限性。
And VEGF-Trap seemed to cause fewer bowel perforations, a big problem in the earlier Avastin study.
FORBES: Magazine Article
Here, the pixels shrank from 4mm2 to just 1mm2 -- roughly the same size as the tiny acoustic perforations.
ENGADGET: This is what native 4K home cinema looks like on Sony's VPL-VW1000ES projector
Trauma experts will likely watch some patients for several days for signs of such perforations, including sepsis, he said.
WSJ: Injuries Resemble Traumas of War
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