Unbuttoning his shirt, folding his trousers into a neat pile on the sink, he gave the impression of a man who had spent his life on the rails and was now, at 78, preparing for one final departure.

他解开衬衣扣子，在水槽上把裤子整齐地折叠起来，给人的印象是一个在铁路上度过了一辈子的男人。 而现在，在78岁的高龄，他准备做最后的出发了。

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This method can realize net shape forging by optimizing preform die shape. Flashless final forging with complete die fill and without folding-over defect can be obtained.

该方法通过优化设计预成形模具形状，可实现精形终锻，得到无飞边、完全充满型腔和无折叠的终锻件。

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The choice of purification methods and the source of the drug will determine the nature and amount of contaminants in the final medicine. (Nothing is ever 100% pure.) Moreover, protein folding, various kinds of enzymatic modifications and impurities inevitably introduce variation, sometimes with unexpected results.

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