import { WorkBook } from './workBook';
/**
 * 将二维数组转换为 csv 字符串
 *
 * https://www.rfc-editor.org/rfc/rfc4180.html
 */
export declare function aoa2csv(aoa: string[][], FS?: string): string;
/**
 * 将 WorkBook 转换为 csv 字符串
 */
export declare function wb2csv(wb: WorkBook): string;