名词石块铺砌，护坡

1. 潘宁：电镜常用二个真空规:一个是用于测量真空度在10 ? 1Pa以下的低真空规,与机械泵相对应,常用的有热传导式的皮拉尼(Pirani)真空规. 另一个是用于测量真空度在10 ? 1~10 ? 5Pa的高真空规,常用的是冷电离型的潘宁(Penning)规.

2. 用锤尖锤击：PennineRange彭奈恩山脉 | penning用锤尖锤击 | Penninggauge彭宁冷阴极电离真空计

noun

1. the act of creating written works

    e.g. writing was a form of therapy for him
           it was a matter of disputed authorship

    Synonym: writingauthorshipcomposition