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spectrum emission
例句
原声例句
PBS趣味科普
This is called an emission spectrum.
这叫做发射光谱。
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contact process
contact reaction
Contact report.
contact report
contact resistance
contacts
contact service
contact sheet
contact site
contact sport
contact sports
contacts resistance
contact surface
contact surfaces
contact technique
contact test
contact theory
contact time
Contact Tracing
contact track
contact transmission
contact type
contact um
contact us
contact way
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更新时间:2026/9/29 14:17:42