"picoliter" or "picoliter", the unit of volume measurement, is a non-SI unit, which is equivalent to "10-15th power" cubic meter, that is, 1000 cubic micron.
In English vocabulary books, place refers to the plural form of commonly used words, which is actually the abbreviation of plural.
PL (Photoluminescence) is one of the various forms of fluorescence, which refers to the process that a substance absorbs photons (or electromagnetic waves) and then re-radiates photons (or electromagnetic waves).
PL energy-saving lamp is a new type of fluorescent lamp.