first and foremost   (TTS發音)

as the first and principal thing首先；最主要的是

    Our experiments are in comformity with the physical law，first and foremost with the Theory of Relativity. 我們的實驗是符合自然法則的，首先是符合相對論。

    First and foremost，we have to consider the morality of the enterprise. 首先，我們應當考慮企業的道德問題。

    He who would be a good student must，first and foremost， study hard. 想當好學生，先要努力學

    First and foremost， the refugees needed food. 最重要的是，難民們需要食物。