1.1
- page.同PAGE.
1.2
- (p-)in combination Chemistry para-.【化】同PARA-:
p-xylene.
1.4
- Music piano (softly).【乐】同PIANO（轻声地）.
1.5
- in combination(in units of measurement) pico- (10-12).同PICO-（计量单位）：
a 220 pf capacitor.
220微微法的电容器。
1.6
- Chemistry denoting electrons and orbitals possessing one unit of angular momentum【化】（电子和轨函数有一个单位的角）动量。
- ORIGIN: from principal, originally applied to lines in atomic spectra.