establish

The scientists worked tirelessly to establish the efficacy of the new vaccine through extensive clinical trials.

科学家们不知疲倦地进行广泛的临床试验，以确定新疫苗的有效性。

There is a strong need to establish effective communication links between staff, parents, pupils, and external bodies.

非常有必要与员工、家长、学生以及其他各方建立有效的沟通渠道。

I spent several years trying to establish myself as a painter.

我花了几年时间努力试图建立自己的画家地位。