1. A theoretically perfect absorber of all incident radiation. 
   黑体能吸收全部入射辐射的理论上的理想物体
2. Something resilient used as a rest, support, or shock absorber. 
   弹力垫有弹性的东西，用作休息处、支撑物或缓冲物
3. a lustrous gray strong metallic element resembling titanium; it is used in nuclear reactors as a neutron absorber; it occurs in baddeleyite but is obtained chiefly from zircon. 
   一种有光泽、灰白色、坚固的金属元素，类似钛，在核反应堆中用作中子吸收剂，见于斜锆石中。
4. a measure of the rate of decrease in the intensity of electromagnetic radiation (as light) as it passes through a given substance; the fraction of incident radiant energy absorbed per unit mass or thickness of an absorber. 
   测量某种物质（如光）在通过特定物质时电磁辐射强度衰减率的单位；被单位质量或厚度的吸收物所吸收的入射辐射能。

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• 2. 吸收器
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• 3. 吸收体
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• 4. 吸收剂
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