确定 + Clause/Noun
确定 (quèdìng) means 'to determine,' 'to confirm,' or 'to be certain about.' It can function as both a verb and an adjective, depending on context. As a verb it takes a clause or noun object; as an adjective it describes something that is settled or definite.
我们需要先确定会议的时间和地点。
Wǒmen xūyào xiān quèdìng huìyì de shíjiān hé dìdiǎn.
We need to first determine the time and location of the meeting.
你确定他说的是真的吗?
Nǐ quèdìng tā shuō de shì zhēn de ma?
Are you sure what he said is true?
经过反复测试,科学家终于确定了实验结果。
Jīngguò fǎnfù cèshì, kēxuéjiā zhōngyú quèdìng le shíyàn jiéguǒ.
After repeated testing, the scientists finally confirmed the experimental results.