Once the order has been confirmed by the user, the online trading application deducts the necessary cost from the user's account.

一旦订单被用户确认后，在线交易应用程序从用户帐户中扣减必要的费用。

youdao

Mr. Obama's plan to curb carbon dioxide emissions, though necessary, will be far from cost-free, whatever his sunny speeches on the subject might suggest.

尽管奥巴马的二氧化碳减排计划是必要的，但这远不是免费的，无论他在这个问题上发表的充满希望的演讲可能会暗示什么。

youdao

Mr. Obama's plan to curb carbon dioxide emissions, though necessary, will be far from cost free, whatever his sunny speeches on the subject might suggest.

尽管奥巴马的二氧化碳减排计划是必要的，但无论他在这个问题上发表的充满希望的演讲可能会暗示什么，这远不是免费的。

youdao

Matt Hastings, the energy manager, said it was necessary because the cost of energy was increasing.

BBC: Energy efficiency boost at Eden Project

But start with this underlying fact: the cost of the raw materials alone necessary to make the battery is higher than the cost of gasoline.

FORBES: A123 Bites the Dust Because They Forgot Their ABCs

The euro crisis has been primarily a debate over who will bear the cost of necessary adjustments, a debate that looks increasingly settled.

WSJ: What Cameron Needs to Say on Europe