otitis-externa
发表于 2025-3-21 18:16:38
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感情脆弱
发表于 2025-3-21 23:25:27
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Vasodilation
发表于 2025-3-22 00:42:16
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消散
发表于 2025-3-22 08:37:08
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进步
发表于 2025-3-22 10:38:56
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paltry
发表于 2025-3-22 15:25:53
C,An X-ray band covering the wavelenghts 5 nm to 10 nm.
lethal
发表于 2025-3-22 17:52:44
G,The ratio of the maximum signal received from an . when acting as a transmitter to the signal that would be received if the same total energy were to be broadcast equally in all directions. For a . it is in effect the amplifying factor obtained by using the antenna. See also: ..
formula
发表于 2025-3-23 00:50:17
L,The standard that the optics of a telescope must achieve, if the instrument is to deliver its .. The criterion is that the deviations of the . from perfection must be less than λ/4. See also: ..
Solace
发表于 2025-3-23 01:36:12
M,Two 6.5m optical telescopes for the Mount Wilson Observatory at Las Campanas, Chile. The mirrors are of monolithic . honeycomb construction.
步履蹒跚
发表于 2025-3-23 06:57:30
N,The point directly underneath the observer, opposite to the . in the sky.