简单地说

Simply put, a delta-wing is a triangular wing planform.

简单地说，三角翼就是三角型的翼面。

The accumulation of capital refers simply to the gathering or amassment of objects of value; the increase in wealth; or the creation of wealth.

资本的累简单地说就是指有价值的东西的累，财富的增加或创造。