词汇	echelon lenses
释义	echelon lenses 🌏梯形镜片
随便看	symmetric cryptographic systems symmetric cryptographic technique symmetric cryptography symmetric cryptography algorithms symmetric cryptology symmetric cryptosystem symmetric current symmetric curve symmetric curved surface symmetric curved surfaces symmetric cycle symmetric cylinder symmetric deflection symmetric deformation symmetric degree sequence Symmetric dense linear systems symmetric density symmetric derivative symmetric design symmetric designs symmetric determinant Symmetric diabetic proximal motor neuropathy symmetric difference symmetric difference gate symmetric-difference gate