a cloud on the horizon

US /ə klaʊd ɑn ðə ˈhaɪ.rɪ.zən/
UK /ə klaʊd ɑn ðə ˈhaɪ.rɪ.zən/
"a cloud on the horizon" picture
1.

隐忧, 潜在问题

a potential problem or difficulty that may arise in the future

:
Despite the current success, there's a cloud on the horizon regarding the company's future funding.
尽管目前取得了成功,但公司的未来融资方面仍有隐忧
The new regulations cast a cloud on the horizon for small businesses.
新规定给小企业带来了隐忧