Definition: to find out information or prove something Level: C2
警察正在努力查明他是如何死亡的。
The police are trying to ___establish how he died.
总之，很难确定人们如何选择购买他们所买的东西。
In summary, it is difficult to ___establish how people choose to buy what they buy.
科学家旨在通过广泛研究确定这种疾病的原因。
Scientists aim to ___establish the cause of the disease through extensive research.
