a = adjective 形容詞
ad = adverb 副詞
vi = intransitive verb 不及物動詞
vt = transitive verb 及物動詞
aux = auxiliary verb 助動詞
prep = preposition 介係詞
conj = conjunction 連接詞
pron. = pronoun 代名詞
int. = 感嘆詞, interjection
abbr. = abbreviation 縮寫
phr. = phrase 片語
art = article 冠詞
u = uncountable noun 不可數名詞
c = countable noun 可數名詞
pl = plural 複數