Official sale
正式───formal;发售───sale
They decided to put their relationship on a more formal footing.───他们决定正式交往。
I am offended that your entertainment expert should make such a mistake and hereby request a formal apology.───令我感到气愤的是，你们的娱乐节目专家竟然会犯这样的错误，我特此要求你们向我正式道歉。
It's illegal to get into a formal agreement with investors that they'll buy in the aftermarket.───与投资者达成正式协议、允许他们在后市上买入的做法是非法的。
You arrived at your conclusion using the methods of formal logic.───你这个结论是按照形式逻辑的方法推论出来的.
They wore ordinary ties instead of the more formal high collar and cravat.───他们打着普通的领带，而不是更为正式的高领领结。
Formal talks are still said to be a possibility, not a probability.───据称正式会谈仍有可能，但可能性不大。
The letter is written in a formal style.───这封信是用正式文体写的.
Formal authorization for the trip was given last week.───这次行程上周得到正式批准.
Jeans are not appropriate for a formal party.
Formal communication channels are usually vertical.
Sports clothes are not appropriate for a formal wedding.
They agreed to draw up a formal agreement.
He gave a formal bow and left the room.