HBM芯片的制造更是增加了特殊挑战：其规模化生产异常困难。制造过程需将多枚比发丝更薄的内存颗粒以微米级精度垂直堆叠，任何细微瑕疵都可能导致整组芯片报废，这使得生产效率低于传统DRAM，良品率也更低。
These requirements will hopefully become more clear as we start trying out different algorithms, and seeing examples of their successes and failure modes. Before we get too deep in the weeds, though, I want to emphasise that not all reactive systems are the same, and some don’t need all of these requirements. For example, lots of simple reactive systems work just fine with static dependencies only, trading off some efficiency wins for implementation simplicity. Similarly, glitches are only important if they are actually observed, so some reactive systems will be glitch-y by default, but provide tools for syncing nodes together if the user actually needs them to be in sync.
Global news & analysis。业内人士推荐新收录的资料作为进阶阅读
（证券时报记者王小伟、严翠、曹晨、刘茜参与采写），更多细节参见新收录的资料
究其原因应与PS Vita本身就没有获得成功有关，而且触摸板设计的抵触等。。新收录的资料对此有专业解读
兩位改革派候選人穆薩維（Mir-Hossein Mousavi）與卡魯比選後遭到軟禁。伊朗消息人士對BBC波斯語記者表示，穆傑塔巴在2012年2月會見穆薩維，並勸他放棄抗議。