书籍 Solutions - 中高级 - 单元 4 - 4G

the feeling of being uninterested or restless because things are dull or repetitive

无聊, 乏味

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

舒适, 安慰

the state of being helpful or useful for a specific situation

便利, 方便

an amount we pay to buy, do, or make something

成本, 价格

suitcases, bags, etc. to keep one's clothes and other belongings while traveling

行李, 行李箱

the condition of being protected and not affected by any potential risk or threat

安全, 保护

the quantity that is measured in seconds, minutes, hours, etc. using a device like clock

时间, 时长

a feeling of nausea and dizziness caused by motion, especially during travel in a vehicle like a car, boat, or plane

晕车, 晕动病