例句與造句

1. Formally, a kernel function is a non-negative semidefinite kernel ( see Mercer's condition ), representing an inner product between samples in a high-dimensional space, as if the samples had been expanded to include additional features by a function : ? ( "'x "') ?? ( "'x " " ) } }.
2. It's difficult to find semidefinite kernel in a sentence. 用semidefinite kernel造句挺難的