首先你必须通过移民局和海关的检查。

First, you have to go through immigration and customs.

《柯林斯英汉双解大词典》

如果可以的话，我将首先谈谈，中央银行到底是什么，比如说联邦储备局，还有他们都做什么。

If you'll allow me I will talk first about just what is a central bank such as the Federal Reserve and what do they do.

youdao

如果洛克希德公司的计划美国航天局批准的话，该公司首先需要建立一个重机和升降机，如果真是那样，，L - 2赛德团猎户座飞船的火星之旅最早也就是在2016年左右。

Should Lockheed’s plan be approved by NASA the company needs to first build a heavy lifter machine and, assuming that happens, an L2-Farside mission could take place as early as 2016.

youdao