The wreckage in Abbottabad appeared to have exotic coatings and distinct surfaces and edges reminiscent of stealth aircraft such as the B-2 bomber and the F-22 fighter, aviation experts say.

航空专家说，阿伯塔巴德的飞机残骸似乎具有特殊的涂层和独特的机身表面及边缘，让人联想到B-2轰炸机和F-22战斗机等隐形战斗机。

youdao

He goes on to say, "[f] ROM the bottom, you really have to understand a lot about technologies and about the technology organization itself."

他继续说道：“从底部开始，您必须对技术和技术组织本身有非常多的理解。”

youdao

So, we can say that -- if we have neon here and we want to think about what's isoelectronic, -- f minus would be isoelectronic. We also have oxygen -- what would the charge on oxygen be?

那么，我们可以说--如果我们这里有氖原子,而我们想知道与它等电子的是什么，负一价的氟离子就是与它等电子的，我们还有氧-,氧应该是几价的？

youdao

F.A.O.officials say the general ideas for an international agreement or treaty are now largely in place.

VOA: special.2009.02.10

So if we want to write out what that would be, it would just be to say that f minus is isoelectronic with neon.

那么如果我们把它写出来，它应该就是负一价的氟离子与氖原子是等电子的。

麻省理工公开课 - 化学原理课程节选

Let's bind z eh let's bind z to the-- f if I could type it would help-- say, f of 3. OK?

让我们给z赋值--如果我能打字就好了-,比方说？

麻省理工公开课 - 计算机科学及编程导论课程节选

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