But the tragedies of Virginia Tech—and Columbine, and Nickel Mines, Pennsylvania, where five girls were shot at an Amish school last year—are not the full measure of the curse of guns.
但是，弗吉尼亚理工大学和Columbine的悲剧，NickelMines的悲剧，去年宾夕法尼亚州一所社区学校内发生的5名女生死亡枪击事件的悲剧，所有这些，还仅仅是“枪支罪行”的一部分。
Effect of pressure and time of shot peening on recrystallization of nickel base single crystal superalloy was studied.
研究了喷丸压力和喷丸时间对一种镍基单晶高温合金再结晶的影响。
Effect of pressure and time of shot peening on recrystallization of nickel base single crystal superalloy was studied.
研究了喷丸压力和喷丸时间对一种镍基单晶高温合金再结晶的影响。
应用推荐