至今为止，科学家利用转镜经纬仪已经发现或证实了100余颗外部行星的存在。
Transits have yielded the discovery or confirmation of more than 100 planets to date.
转镜式傅里叶光谱仪中，转镜的转动形成光程差的非线性。
High-speed rotary Fourier transform spectrometer has nonlinearity of optical path differences (OPD) because of refractor's rotating.
转镜的转动会导致光程差存在非线性问题，是转镜式干涉光谱仪普遍存在的问题。
The nonlinear problem of optical path difference (OPD) of rotating Fourier transform spectrometer universally exists, produced by the rotation of rotating mirror.
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