Characters
Your sentence
今天 比 昨天 冷 一点儿
Words in this sentence
今天
today; the present time; now
比
to compare; (followed by a noun and adjective) more {adj.} than {noun}; ratio; to gesture; (Taiwan pr. bì in some compounds derived from Classical Chinese)
昨天
yesterday
冷
cold
一点
a bit; a little bit; (used in negative expressions) (not) the least bit; (after an adjective, used to form the comparative) a bit more, -er; a point (in a discussion etc); (calligraphy) dot stroke (、); one o'clock (abbr. for 一点钟 (yīdiǎnzhōng))