du/dT constant pressure is the direct derivative with respect to temperature here, which is sitting by itself under constant volume keeping this constant but there is temperature sitting right here too.

偏U偏T，p恒定是对,温度的直接微分，而它本身对体积不变,保持它不变，但是这里也有一个温度,这就是偏U偏V，T恒定。

麻省理工公开课 - 热力学与动力学课程节选

Energizer hasn't exactly been keeping this one much of a secret, but the battery maker has now finally gotten official with its much-vaunted Zinc Air Prismatic battery technology, which it says will allow electronics manufacturers to make devices that last longer and are smaller and lighters.

ENGADGET: Energizer introduces thin, powerful Zinc Air Prismatic battery

Overall, this editor prefers the feel of the F3, but can't knock Sony for focusing on keeping this thing as tiny as possible.

ENGADGET: Sony's NEX-3N and A58 cameras make an in-person appearance, we go hands-on

This is a matter for individual decisions, my own position is that I'm going to have to be talking about asylum a very great deal and I do not want a distraction by everybody keeping asking me why I haven't signed this pledge rather than by concentrating on the policy.

BBC: News Online