nail-biter= a situation causing great anxiety or tension，令人紧张的局势，可数
The landing of the spacecraft on the moon was a nail-biter as its signal was almost lost during its flight.
Abort= bring to a premature end because of a problem or fault. (因问题或错误）而终止，vt
Joe aborted his plan to study acting and become a movie star because he finally thought it would be more suitable for him to be the president of the US.
signatory= a party that has signed an agreement, especially a country that has signed a treaty.签署方（尤指国家）
China is a signatory to a variety of international economic treaties.
span 作vt可以表示“涵盖”的意思
Apple right now has many retail outlets spanning major countries in the world.
stash away= store sth safely and secretly in a specified place，pv，vt，藏匿
Joe stashed away much of his money under his pillow.
Dough除了表示“生面团”之外，还可以表示“钱”，不可数
Joe doesn’t have enough dough to get married.
opulence= great wealth or luxuriousness，奢侈，不可数
Many social media influencers always upload pictures and videos showing the opulence of their lifestyle in order to become more popular.
be ashamed about sth对…而感到羞愧
Joe is ashamed about the fact that he once didn’t keep his word to one of his closest friends.
-Fication …化，比如calcification钙化，视频中出现的social media fication of society意思是社会的社交媒体化（也就是社交媒体在社会上非常流行的状态）
