1. word

ground: reason, because

ground作為理由理解的時候通常為復(fù)數(shù)

valid/ethical ground

ground of/on

there is no ground for…… 不必……

on the fround of/that 以……為理由，因為……的理由，以……為根據(jù)

a ground for? 一個……的理由

2. translation

因為英語不夠好，他拒絕了邀請。

He refuses the invatation on the ground of his poor English.

3. usage

我經(jīng)常以自己沒有時間為理由不去做一些很重要的事情

On the ground of lack of time, I used to delay to do something which really significant.