例句與造句

1. :: Well integrating ln ( x ) isn't the problem, the problem is the anti-derivative of that product is not elementary, you need something akin to the Cosine Integral, Ci ( x ) ( according to mathematica's free online integrator ), to get the anti-derivative of that function . talk ) 06 : 40, 22 April 2008 ( UTC)
2. It's difficult to find cosine integral in a sentence. 用cosine integral造句挺難的