If you get some of these in the upper atmosphere, a photon, an ultraviolet photon, has the energy capable of breaking this bond.

如果你把它放到大气层上，一个光子，一个紫外光光子，有能量可以破坏它的化学键。

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In other words, they flipped a switch, which allowed them to change the electrical conductivity of the silicon without making or breaking a single chemical bond within the surface.

或者说，他们扳动了一个开关，改变了硅的电导率，而不需破坏表面上的任何化学键。

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In femtochemistry, we describe the application of femtosecond lasers to studies of chemical reaction processes, isomerization, breaking and forming of the bond, and the dynamics of transition states.

飞秒化学则主要介绍了飞秒技术在研究光化学反应、光解离过程、键的断裂与结合以及相关的动力学过程的应用；

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If you get some of these in the upper atmosphere, a photon, an ultraviolet photon, has the energy capable of breaking this bond.

如果你把它放到大气层上，一个光子，一个紫外光光子，有能量可以破坏它的化学键。

麻省理工公开课 - 固态化学导论课程节选

So in order to rotate a double bond, you have to actually break the pi bond, so essentially what you're doing is breaking the double bond.

为了能够旋转双键，你必须打破一个π键，本质上我们要做的就是打破双键。

麻省理工公开课 - 化学原理课程节选

So, if we talk about dissociating h 2, we're going from the h 2 molecule, and breaking this bond right in half, so we now have two individual hydrogen atoms here.

那么，如果我们讨论的是离解氢分子，我们将从氢分子开始，使这个键断裂，一分为二，那么就得到了两个分开的氢原子。

麻省理工公开课 - 化学原理课程节选

After breaking their euro-era highs last week, Portuguese benchmark 10-year bond yields surged to 8.18% by 1:39 PM in New York, taking their spread with German bunds to 487 basis points.

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