书籍 Four Corners 4 - 第 8 单元 B 课

to feel upset and nervous because we think about bad things that might happen to us or our problems

担心某事

a comforting action or statement made to someone to ease their worries, uncertainties, or anxieties about something

放心

of, connected with, or affecting all the people in a society

民众

the way something is shown or displayed, including how it looks and is arranged visually or in a particular format

介绍

feeling nervous or worried because of thinking something unpleasant might happen

担心

to find a solution to a problem, often through analysis, experimentation, or mathematical calculation

制订