These qualities, though, are offset by arbitrary spelling, and, besides, there are other languages, such as Russian, that have spread despite being difficult to master.

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The new technology was difficult to master, said Sorrell, and people who knew little about advertising were assigned to create the first television ads, resulting in much animation, singing and jingles.

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It's a bit difficult to master, but we find it's more efficient if you put a little bit of your fingernail into it -- not too much, of course, you don't want to scratch your precious reader.

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The reason for this is that virtualization is a very difficult technology to master.

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Spare and snappy as this preparation is, Mr. Vetri believes it is actually one of the more difficult pastas to master.

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Unstructured customer conversation content is very difficult to map to enterprise transaction and master data management systems, which form the core of enterprise business application software.

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These are all really deep tools that are difficult, but rewarding, to master.

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