“就在刚刚开始”可以翻译为 "just at the very beginning" 或 "right at the start"。
"just at the very beginning"：强调时间点非常接近开始时刻，带有“刚刚、恰好”的意味。
"right at the start"：更口语化，直接表达“一开始、刚启动”的场景。
例句：Just at the very beginning of the meeting, he raised an important question.（会议刚刚开始，他就提出了一个重要问题。）
Right at the start of the project, we faced unexpected challenges.（项目刚一开始，我们就遇到了意想不到的挑战。）