这并不容易，但它是良好的动力。
很好，第一个例子是个良好的开始，但它是3d的吗？
近几年公司美国的利润一直运转良好，但它是个周期性现象，而周期正在转向。
Corporate America's profits have had a good run in recent years, but they are cyclical phenomena and the cycle is turning.
高铬铸铁具有良好的耐磨性，但它是一种脆性材料，薄壁的高铬铸铁还有巨大的开裂倾向，铸造难度较高。
High chromium possesses good abrasion resistance, but it is a kind of friable materials. Thin-walled high chromium cast iron pipes also have a tendency to crack, so it is difficult to cast.
高铬铸铁具有良好的耐磨性，但它是一种脆性材料，薄壁的高铬铸铁还有巨大的开裂倾向，铸造难度较高。
High chromium possesses good abrasion resistance, but it is a kind of friable materials. Thin-walled high chromium cast iron pipes also have a tendency to crack, so it is difficult to cast.
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