单词	光频（率）
释义	光频（率）frequency of light
随便看	invariant delta-function invariant derivative invariant differential invariant differential equation invariant differential form invariant differential operator invariant dimension property invariant distribution function invariant divisor invariant domain invariant element invariant element of transformation invariant embedding approach invariant embedding solution invariant equation invariant equilibrium invariant estimation invariant event invariant expression invariant factor invariant family of distributions invariant field invariant form invariant function invariant geodesic