This front-end layer is often divided into several thin layers, such as login, border, boundary, and load balancing.

这个前端层常常进一步划分为几个子层，比如登录、边界和负载平衡。

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For some API calls, the transaction might start and end at the API layer, whereas other times it might be scoped only at the DAO layer (particularly for single-table updates within the LUW).

对于一些API调用，事务可能会在api层的末端开始，而其他时候，它可能仅限于dao层(特别是对于LUW中的单表更新)。

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With the API layer transaction strategy, it's not the end of the world if you start a transaction at the client layer during a refactoring effort.

对于api层事务策略，您在重构过程中在客户端层上开始一个事务并不会引起灾难性后果。

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And you end up with the destruction of the ozone layer.

最终臭氧层被破坏。

麻省理工公开课 - 固态化学导论课程节选

The fourth layer, where most particles end their lives, is made of caesium iodide crystals.

ECONOMIST: How to build a B-factory

To that end it's created the TV Application Layer (TAL), which uses the latest web technologies, like HTML5, to do as much of the heavy lifting as possible for would-be hardware makers.

ENGADGET

And because the gate and the insulation layer are formed right at the end of the chip-making process, after the high-temperature steps have been completed, it is possible to choose from a wider range of materials for the insulation layer.

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