a safe bet

US /ə seɪf bet/
UK /ə seɪf bet/
"a safe bet" picture
1.

十拿九穩, 穩妥的選擇

something that is certain to happen or to be successful

:
It's a safe bet that the new restaurant will be popular.
這家新餐廳肯定會很受歡迎
Given his track record, he's a safe bet for the promotion.
鑒於他的過往記錄,他獲得晉升是十拿九穩