161. at, in (表地點)　　

at小地點；arrive at a small village
in大地點 例：arrive in Shanghai

162. at work, in work　　

at work在工作，在上班；例：Both my parents are at work.
in work 有職業(yè)，有工作

163. increase to, increase by　　

increase to增長到……；
increase by增長了…… 例：The number increased by 2,000 to 5,000.

164. at ease, with ease　　

at ease舒適地，安逸地；
with ease容易地，無困難地 例：do it with ease

165. day after day, day by day　　

day after day日復(fù)一日（無變化）；
day by day一天天地（有變化）例：Trees grow taller day by day.