first of all
英
/fɜːst ɒv ɔːl/
美
/fɜːrst əv ɔːl/
首先
例句
First of all we must identify the problem areas.
首先我们必须找出问题所在。
First of all, let‘s set the scene.
首先让我们来叙述一下背景。
First of all, your robot would have to be able to sense the environment around it.
首先,你的机器人必须能够感知周围的环境。
