单词	the focus of sth
释义	the focus of sth 某物的中心
随便看	elliptic paraboloid shell elliptic parallel elliptic partial differential equation Elliptic Partial Differential Equations elliptic partial differential operator elliptic partial differential operators elliptic PDE elliptic PDEs elliptic pencil of circle elliptic pendulum elliptic periodic solution elliptic periodic solutions elliptic pin elliptic piston elliptic plane elliptic plane geometry elliptic plate elliptic point elliptic polarization elliptic polarized antenna elliptic polarized wave elliptic pot elliptic problem elliptic problem with parameter elliptic projection