确定无疑què dìng wú yí

there is no doubt of sth
❍ 彻底扫除这些垃圾，仍然需要时间； 这些东西崩溃之势已成，则是～的了。(《毛泽东著作选读》甲—381) To clear away the rubbish completely will still take some time,but there is no doubt of their inevitable and total collapse.