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focometer
释义
WordReference Random House Unabridged Dictionary of American English © 2024
fo•com•e•ter
(fō kom
′
i tər),
USA pronunciation
n.
[
Optics.
]
Optics
an instrument for measuring the focal length of a lens or other optical system.
foc
(
us
) + -
o
- + -
meter
1850–55
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helmont
helm port
helmsman
helmsmanship
helo
helos
helot
helotage
helotism
helotry
help
helpable
helper
helper t cell
helper t-cell
helpful
helpfully
helpfulness
helping
helping hand
helpingly
helping verb
helpless
helplessly
helplessness
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更新时间:2026/6/28 7:08:01