在缺乏完整数据之前,研究者不能轻易断定某种药物完全无效。Zài quēfá wánzhěng shùjù zhīqián, yánjiūzhě bù néng qīngyì duàndìng mǒu zhǒng yàowù wánquán wúxiào.Before complete data is available, researchers cannot lightly conclude that a certain drug is entirely ineffective.
现在还不能断定是谁打碎了花瓶。Xiànzài hái bù néng duàndìng shì shéi dǎsuì le huāpíng.We cannot yet determine who broke the vase.
根据脚印,警察断定小偷是从窗户进来的。Gēnjù jiǎoyìn, jǐngchá duàndìng xiǎotōu shì cóng chuānghu jìnlái de.Based on the footprints, the police concluded that the thief came in through the window.