first buy order

基本解释

First you must buy, order, and wait to install your new hardware.
首先，必須購買、訂購和等待安裝新的硬件。
Sometimes, we buy things without thinking. Some people who dislike shopping grab the first thing they see, or prefer to use mail-order or the Internet.
有時候，我們不加思索地購物，有些不喜歡購物的人匆匆忙忙地抓起自己第一眼看到的物品或者更願意郵寄訂購或者選擇網絡。
If you are looking forward to buy a dog, you should first consider their price factor in order to ensure that you arepaying the right price for your pet and not getting cheated by any chance.
如果你想買狗的話，首先需考慮它們的價格因素以確保價錢郃理而不被欺騙。

They do not know when this unlockable phone will come out, but you can be sure the release has been timed (read: delayed) to make sure that everyone has a chance to buy a locked model first in order to protect the carriers.
FORBES: Wireless Carrier Lock-In, iPhone 5 Edition
Here is how Island works: When a broker or trader who uses Island places a buy order, it is routed first to Island to check for matches.
FORBES: Guerrillas on Wall Street