她在会议上详细阐述了新的营销策略。

She spent an hour ___elaborating on the new marketing strategy during the meeting.

请详细说明你的计划，我们需要更多细节。

Please ___elaborate on your plan; we need more details.

她花了一整天精心制作这份详细的报告。

She spent the whole day ___elaborating this detailed report.