to remove a cover from a statue, painting, etc. for the people to see, particularly as part of a public ceremony
揭幕
causing or involving a grand or fundamental change, particularly leading to major improvements
革命性的
used to show that something happened or is true, even though there was a difficulty or obstacle that might have prevented it
尽管
a sudden and unfortunate event that causes a great amount of death and destruction
灾难
to change from one thing, such as a task, major, conversation topic, job, etc., to a completely different one
切换
to show clearly that something is true or exists by providing proof or evidence
演示
a small, round object, usually made of plastic or metal, sewn onto a piece of clothing and used for fastening two parts together
纽扣
a type of small bag in or on clothing, used for carrying small things such as money, keys, etc.
口袋