back order
noun [ C ] (also back-order); (US also backorder) uk/ˈbæk ˌɔː.dər/ us/ˈbæk ˌɔːr.dɚ/
待交订（货）单
a request to buy goods that are not available now but will be available in the future
The luggage company's offices are full of back orders for its signature bags. 这家行李箱公司的办公室里堆满了其招牌包的待交订单。
on back order 缺货中;无现货
requested for a future time when it or they will be available to buy
"We have dozens of copies on back order", said the bookshop manager. 书店经理说：“我们有几十本书尚待补货。”
She said the masks are on back order and may not arrive for some time. 她说，这些口罩供不应求，可能要过一段时间才能到货。
We have lots more copies of the book on back order, so it's best to reserve a copy.
Fifty of the aircraft are in service, with over two thousand more on back order.
The manager told us that their coal stoves are on back order until June.
- More examples
- The system shifts demand to where there is supply, instead of piling up back orders for inventory that doesn't exist.
- Until the shipment arrives, you can place a back order and your credit card will be charged just prior to shipping.
- Some companies, particularly in agricultural equipment, are taking back-orders for up to a year and a half.
- Most operators have additional breathing devices on backorder from one of two major manufacturers.
back order
verb (also back-order) uk/ˈbæk ˌɔː.dər/ us/ˈbæk ˌɔːr.dɚ/
预定（订购目前暂时缺货的产品）
to request to buy goods that are not available now but will be available in the future
Gas masks were being back ordered while public health officials sought to play down the risks. 在公共卫生官员试图淡化风险的同时，防毒面具却因缺货而需预订。
Our store was sold out within minutes and now the product is back-ordered. 该产品在我们店里几分钟内就售罄，目前处于预订后交货状态。
- More examples
- A vendor ships part of a shipment to a retailer and back orders the remainder.
- The bracelets have sold out in stores and are back-ordered online.
- Some sellers will send everything together in one shipment, others send what they can right away and then charge you another shipping fee when they send a back-ordered item.