一方面是由于操作人员加工前的操作准备不当，另一方面是由于复杂曲线轮廓编程误差所致。
On the one hand, it is caused by the improperly-prepared operators before the machining; on the other hand, it is caused by the complex curve programming error.
更有效的税收方式应是以食品成分在加工前的成本与食物成品价格之差为税基对食品生产商课税。
A more efficient tax would be a tax on producers of food, based on the difference between the cost of the ingredients before processing and the price for the finished product.
在附近一家工厂，锈迹斑斑的铁门里，40名工人站在机器前把蚕茧加工成蚕丝。
In the nearby factory behind rusted gates, 40 workers toil at machines that transform cocoons into silk thread.
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