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- Aluminium material was electropolished with ad dition of additive TA in alkaline solution by periodic reverse current. 采用周期换向电解法,在添加适量添加剂TA的碱性溶液中对铝材进行电解抛光。
- The hypothesis was substantiated soon afterward by the discovery that periodic reversals of the Earth's magnetic field are recorded in the oceanic crust. 这个假定不久之后为发现所证实。 该发现表明地球磁场周期性的逆转被记录在海洋地壳中。
- The experimental results show that AlCu alloy, which is difficult to be treated usually, can be anodized and colored in sulfuric acid with periodic reverse direct current, a... 研究结果表明:应用周期换向电流法可以在硫酸溶液中对较难氧化着色的铝铜合金进行氧化发色,得到黄-黄绿-绿-黑绿-黑系列颜色的氧化膜。
- Results of study showed that effect of electropolishing by periodic reverse current wa s better than that by traditional method and direct current-constant voltage. 经研究表明,其抛光效果优于采用传统方法和直流恒压法进行电解抛光的抛光效果,而且其工艺具有操作温度低、溶液使用寿命长及铝材溶解损耗少等优点。
- That period was a bright page in the history of Chinese literature. 那个时期是中国文学史上光辉的一页。
- Let us hope that the period of this injustice will be over soon. 让我们希望这个不公正的时期很快结束吧。
- In alternating current (AC) the motion of the charges is periodically reversed; in direct current (DC) it is not. 在交流电中,电荷流动会定时的反向,而在直流电中则不会。
- Childhood is a period of rapid growth. 幼年是生长迅速的时期。
- He consulted the chronicles of the period. 他参考了这一时期的编年史。
- He had to decide within a given period. 他得在一定时间内作出决定。
- She has a detailed knowledge of this period. 她对这段时期的情况了解地相当详细。
- In that period auto sales hit a14-year low. 这时期汽车销售量达到14年来最低水平。
- In this period, unemployment reaches record levels. 这段时间的失业人数又达到了创纪录水平。
- Which period of history are you studying? 你正在学哪一段历史?
- Can you tell me the time period when it was stolen? 能不能告诉我大概什么时候被偷的?
- Chaucer wrote in the late mediaeval period. 乔叟写作的时代是中世纪末。
- She'll be away for an indefinite period. 她将离开一段时间,何时回来未定。
- This was the most difficult period of his life. 这是他一生中最艰难的时期。
- The meeting finally came to a period. 会议终于结束了。
- A period signals the end of a sentence. 句号表示一个句子结束了。