出国需要掌握以下词汇：

基本问候语和礼节用语

Hello, hi, thank you, please, excuse me, sorry 等

自我介绍

My name is..., I come from..., I am a student/worker 等

交通出行相关

Take a taxi, bus, train, plane

Go to the airport, check in, boarding pass, airport terminal, international airport, domestic airport, luggage claim

住宿相关

Condo, apartment

饮食相关

Buffet, restaurant, menu

购物付款相关

Shopping mall, store, credit card, debit card, currency, balance, overdraft

电子设备相关

Charger, electronic device

学习相关

Academic year, academic advisor, accreditation, admission

其他常用词汇

Bank account, overdraft, credit card, debit card

Asking for directions, shopping, emergency phrases

这些词汇涵盖了出国生活、学习、交通、住宿、饮食、购物和紧急情况等多个方面，有助于你在国外更好地适应和交流。建议你在出发前认真复习这些词汇，并在实际生活中不断应用，以提高自己的语言能力。