Vocabulary consisting only from characters you are able to read
土木
doboku
public worksmix
前回
zenkai
previous time, last time, previous installment, previous instalment, previous sessionmix
工学
kougaku
engineeringmix
口語
kougo
(1)spoken language, (2)literary style based on (modern) spoken language bunpou
大体
daitai
general, substantially, outline, main point, approximately, aboutjlpt3