Something I can measure and I can tabulate, and when I turn my dT knob, I know what's going to happen to the enthalpy.

我可以测量它并制成表格，当我转动 dT 旋钮，我就知道焓的变化了。

youdao

dy x dt That tells us dx is x prime of t dt.

是y’dt，dy，becomes，y，prime，of，t，dt。,是x，So，，we，know，x，is，x，of，t。,它告诉我们dx是x

youdao

So that's d/dt of h.

所以是对h进行d/dt运算。

youdao

Now you have to know from elementary calculus that v times dv/dt is really d by dt of v square over 2.

根据初等微积分知识你们得知道,v乘以dv/dt其实就是d/2)/dt

耶鲁公开课 - 基础物理课程节选

Deutsche Telecom ( DT) is paying 9.1%, Telecom Italia ( TI) 5.4%, France Telecom ( FTE) 11.1% and Vodaphone Group ( VOD) a 7.9% dividend.

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There are questions however about how effective this directive will be in facilitating competition, because the two incumbents with the biggest cable operations, Deutsche Telekom (DT) and British Telecommunications, have already announced their plans to divest their cable operations.

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The biggest loser was Deutsche Telekom (nyse: DT - news - people ), which dropped 20%.

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