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单词
femto-
释义
femto-
Symbol f. A prefix used in the metric system to denote 10
-15
. For example, 10
-15
second = 1 femtosecond (fs)
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Tyndall effect
ultracentrifuge
ultrahigh frequency
ultramicroscope
ultrasonic imaging
ultrasonics
ultraviolet microscope
ultraviolet radiation
umbra
uncertainty principle
underdamped
uniaxial crystal
unified-field theory
union
unit
unit cell
unit magnetic pole
unit vector
unitary transformation
universal constant
universal motor
universality
universe
unstable equilibrium
upper atmosphere
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更新时间:2026/5/15 8:06:17