英文關鍵字
alphabet
book
catastrophe
chemical
close
closeup
danger
definition
destruction
dictionary
education
english
environment
explanation
fear
foreign
glossary
grammar
information
interpretation
knowledge
language
learn
linguistics
macro
meaning
military
nuclear
page
paper
poisonous
pollution
pronunciation
protection
research
safety
science
student
study
teacher
terminology
text
toxic
transcription
up
vocabulary
war
warfare
word