预先说明的

【计】 predeclared

预先的英语翻译：

beforehand; in advance; pre-requisite; ready; up front
【经】 in advance; in anticipant

说明的英语翻译：

explain; narrate; account for; illustrate; make out; say; show; specify; state
directions; explanation
【计】 DCL; declaration; elucidata; explanatory notes
【化】 specification; specify
【经】 explanation; explanatory note; justification