掌握在手 meaning in Chinese

in my pocket

She breathed curiosity into us so that we brought in facts or truths shielded in our hands like captured fireflies
她把好奇之心注入我们心中，使我们获得事实与真理，把它们像捕捉到的萤火虫一样掌握在手里。
He adds that the implementation of these principles requires sufficient information and that is why the steering committee believes that a campus habitat map and database on flora and ecology is important
因为制定有效的政策和规划，很视乎你有多少讯息掌握在手。也因为这个缘故，我们很强调要建立一个校园树木和生态的资料库。