But he gave warning that "recovery could be slow and protracted."

然而，他也警告说“经济回复的进程会是长期而缓慢的。”

youdao

He gave me a warning look.

他向我做了一个警告的眼色。

《新英汉大辞典》

He gave me a warning cough.

他以咳嗽警告我。

youdao

He gave me a warning cough.

他以咳嗽警告我。

youdao