退货退款：return & refund
七天无理由退货 :7 Days Retur
秒杀：flash sale/lightening sales
加入购物车：add to cart
下单：place your order
有货/断货：in stock/out of stock
刷爆信用卡：max out the credit card
1 shopping event
Alibaba Group Holding Ltd turned China’s anti-Valentine’s Day into an enormous global shopping event. How will Singles’ Day fare（进展） in a COVID-19 world?（Al Jazeera）
2 shopping extravaganza
An extravaganza is a very elaborate and expensive show or performance. 盛大展示; 盛大表演。比如a magnificent fireworks extravaganza.一场壮观的焰火表演。
The shopping festival, which is the world’s largest and typically begins in November, is an annual extravaganza where China’s e-commerce companies, including Alibaba, and Pinduoduo, offer generous discounts on their platforms.（The Sydney Morning Herald）
3 shopping bonanza
China's Double 11 shopping bonanza enters final 24-hour sprint（CGTN）
something that is very valuable, profitable, or rewarding，比如a box-office bonanza
a very large amount，比如a bonanza of sympathy
extravaganza，比如channels planning all-day viewing bonanzas
Nowadays with the ever rapid development and increasing popularity of the information technology , shopping on the internet has been a fashion especially among the youngsters.
Online shopping has made our daily life more convenient and comfortable. For example , shopping on the internet can save students a great deal of time on the way between home and store, so they would be able to concentrate more time and energy on their academic work. The internet has shorten the distance between manufacturers and consumers and thus we can even buy goods in other countries .On the other hand , lack of the face to face deal makes online shopping less reliable and trustworthy. What’ s more the delivery will increase the risk of items’ damage.
In my opinion, shopping on the internet is a irreversible trend. More and more people will be accustomed to it. It will be much more popular in the near future. And at the same time we should take some measures to make it perfect.