As.

名词 as.:

1. a very poisonous metallic element that has three allotropic forms; arsenic and arsenic compounds are used as herbicides and insecticides and various alloys; found in arsenopyrite and orpiment and realgar
   同义词：arsenic, As, atomic number 33
2. a United States territory on the eastern part of the island of Samoa
   同义词：American Samoa, Eastern Samoa, AS

副词 as.:

1. to the same degree (often followed by `as')
   同义词：equally, as, every bit