常見例句A policeman in plain clothes shadowed the criminal all day.有個(gè)便衣警察整天秘密監(jiān)視那個(gè)罪犯。Suddenly, many plain policemen emerged and those robbers started to flee.突然間很多便衣警察出現(xiàn)了，這些強(qiáng)盜開始逃跑了。 返回 plain clothes man