商店今天所有商品都半价出售。

The store is offering all items at half-price today.

我想卖我的《英语语法》书，这是一本很棒的书，读起来很简单，正好适合你，我正在以不到半价出售；难以置信！

I want to sell my English Grammar book, it's a great book, simple to read, just the right book for you, and I am selling it at less than half price; INCREDIBLE!

我们将以半价出售全部陈货(库存),若仍有剩余就都扔掉.

We will sell off the old stock at half price and anything remain is thrown away.