substance transfer

• 物质传递

substance transfer的用法和样例：

例句

1. The basic Principle of mass transfer of all kinds in compounds and the test mathods of determining diffusivity and permeability at every condition were introduced in this paper.
   介绍了在橡胶中各种物质传递过程的基本原理，以及在各种条件下测定扩散和渗透性能的试验方法。