四个角 4 - 第 7 单元 D 课

at a time in the past, often used to introduce a fairy tale or fictional story

appearing mechanical or lacking emotion

机械的

a chair with wheels that is designed particularly for the use of disabled persons

轮椅

a state of being free from pain, worry, or other unpleasant feelings

舒适

very necessary for a particular purpose or situation

必要的

books, movies, etc. about imaginary things based on science

科幻

to have actual presence or reality, even if no one is thinking about it or noticing it

存在

the latest or most advanced level of technology, design, or knowledge in a particular field

an old person, especially someone who is retired

老年人

to guess the value, number, quantity, size, etc. of something without exact calculation

估计

to become less in amount, size, or degree

减少

all the individuals who work in a particular company, industry, country, etc.

劳动力

a state where there is not enough of something or someone

短缺

a period of time in which someone no longer works due to old age

黄金岁月

a failure in the progress or effectiveness of a relationship or system

崩溃

an order, particularly given by someone in a position of authority

命令

a way of communicating emotions or attitudes through movements and positions of the face, such as smiling, frowning, or raising eyebrows

面部表情

showing signs of future success or potential

有前途的