ground

a reason for what you say or do, or for being allowed to say or do something

例句:Gene editing has drawn widespread public criticism on ethical grounds.

1）翻译下面的句子：

因为英语不够好，他拒绝了邀请。

He declined the invitation on the grounds of his English was not good.

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.

2）场景：英文英语不够好，我不敢主动用英语交流。

造句：I'm afraid to speak English in public on the grounds of that my pronunciation is not good enough.