词汇	clay rock
释义	clay rock 粘土岩
随便看	second-channel frequency second channel interference second-channel interference second character group second characteristic matrix second chebyshev-fourier series second Chebyshev function second Chebyshev polynomials second check second check character flip-flop Second Check Rubber Parts Kit second chemical equilibrium Second Chicago School second chief judge Second Chief Petty Officer second childhood second childhoods Second Chinese Revolutionary Civil War second choice second class berth second-class cabin second-class carriages/compartments/passengers second-choice second choice route second-choices