1.
Firstly, prepare in advance.
首先，要预先准备。
2.
First of all, you are on the wrong street.
首先，你走错路了，
3.
At first there is nothing but a dull roar in our ears and a dazzle in our eyes.
首先，耳鸣，眼花。
4.
First, always eat breakfast.
首先，坚持吃早餐。
5.
The first reason is what I would call "the human factor".
首先是“人的因素”。
6.
First, I'll make a hole.
首先，我要挖个坑。
7.
But first in the school-rooms.
但首先是在教室 。
8.
First, you shuffle the deck
首先， 得洗一下牌，
9.
First she have to go to reception.
首先她得先去接待处。
10.
First, we have to catch some fish.
首先 ，我们得钓几条鱼。
11.
First, Debbie climbed up very high.
首先，黛比爬得非常高。
12.
First of all, you must always wear your uniform.
首先，你必须穿制服。
13.
You must do it beyond all things.
你首先必须做这件事。
14.
We'll get there first.
我们会首先到达的。
15.
Happiness lies, first of all, in health .
幸福首先在于健康。
16.
We must stop the killing first.
我们首先得制止残杀。
17.
We will consider first a Newtonian substance.
我们将首先考虑牛顿体。
18.
First the surgeon performed the section of the blood vessel.
外科医生首先切开血管。