29.among， between
among 在……中间(三者或三者以上之间)。如：Our house is hidden among trees.
between在两者之间。如：It is easy to distinguish between a Japanese and a Chinese.
30.announce， declare
announce指宣布公众期望或与公众有关的事情，含有预告的意味。如：The government announced that they would pay their debts. (政府宣布将偿还债务。)
declare指正式负责地宣布，声明，通常用于庄重的场合。如：The judge declared him guilty.(法官宣布他有罪。)
