English has long dominated learned journals: German, Russian or French (depending on the field) may be useful to their expert readers, but English is essential.
长期以来，英语就主导着学习刊物：德语、俄语或法语(取决于领域)可能对它们的专家读者有帮助，但是英语是基本的。
English is fairly useful, but it is rather difficult to learn.
英语相当有用，但相当难学。
English is not only useful, but also beautiful and sounds great!
英语不仅是有用，它还是那么的漂亮并且很好听。
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