ground

翻译：因为英语不够好，他拒绝了邀请。

He has refused the invite on the grounds of English is not good enough.

（参考翻译：He turned down the invitation on the grounds that his English was not good enough. 或者 On the grounds of inadequate English, he declined the invitation. ）

例句：因为身体不舒服他没有去学校上课。

He hasn't gone to school on the grounds that the physical discomfort.

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除了表示：地面，还可以表示为：理由，根据。表示为理由时是复数形式。可替换reason

on the grounds of/that， 表示“因为…的理由”“以…为根据”

grounds for~ 导致…的理由

valid grounds 有根据的理由