the final stage of a period or process One of the hardest parts of the job was that there was no defined end point to the working day. 工作中最困难的部分之一是工作日没有明确的终点。 These clinical trials help us reach the end points necessary to see if the vaccines work. 这些临床试验可帮助我们达到必要的终点，以查看疫苗是否有效。