The concept of anonymous blocks is similar to UNIX shell scripts, which enable several manually entered commands to be grouped and executed as one step.

匿名块的概念类似于unix shell脚本，它支持将几个手动输入的命令合并到一个组，然后作为一个步骤执行。

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Last November, Peter Voser, the Shell chief executive, said: "Safety is, has been, and forever will be, our number one priority.

去年11月，壳牌首席执行官彼得付塞说：“安全现在是，以前是，而且永远是，我们第一要考虑的事情。

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In addition, one simple IBMIDDoc document shell, with no real content other than a DITA pointer, can be used to get to any output format already supported by the IBMIDDoc toolset.

此外，可以用一个简单的IBMIDDoc文档shell，其中除了DITA指针外没有实际内容，来获得IBMIDDoc工具集支持的所有输出格式。

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Shell said it hopes to be one of the first companies to volunteer to have its operations in Appalachia go through the independent review.

WSJ: Both sides agree on tough new fracking standards

David Smith-Milne, managing director of PlaceFirst, believes it is important to retain the shell of these houses even though inside, two homes will be knocked into one, creating three or four bedroom properties.

BBC: New life for Accrington ghost streets of terraced homes

Shell is also one of the companies looking at shale-gas reserves in China, which may be the largest on the planet.

ECONOMIST: Shale gas should make the world a cleaner, safer place