n.日光节约时间(直接螺旋铸压)
Some time zones do not have DST. 某些时区没有DST。
Many countries observe DST, and many do not. 换言之，冬令时间将缩短约一个月。
The new 2007 DST start dates and end dates for the United States. 美国2007 DST的新开始日期和结束日期。
Application for DST technique in the test of Shengli Oilfield. 地层测试技术在胜利油田试油中的应用状况
DST revealed 75%AD, 77.8%MID patients were nonsuppressors. 部分地塞米松抑制试验显示：70%25AD、77.
