线性无穷大近似 linear approximation: 线性逼近; 线性接近; 线性近似linear approximation problem: 线性逼近问题piecewise linear approximation: 分段线性近似法, 折线法; 分段折线近似法piecewise-linear approximation: 逐段线性逼近,逐段线性近似at infinity: 无尽的; 在无穷远处下载手机词典可随时随地查词查翻译