任何人可能有同样的问题。 Babel目前不支持导入内联＃1681 ，也不支持gulp-concat，因为它是只是连接文件。

To anyone who might have the same problem. Babel currently doesn't support imports inlining #1681, neither do gulp-concat, as it's just concatenating files.

我选择使用 Rollup 来解决问题

I opted to use Rollup to propertly resolve dependencies and only then transpile output:

var gulp = require('gulp');
var gutil = require('gulp-util');
var babel = require('gulp-babel');
var concat = require('gulp-concat');
var rollup = require('gulp-rollup');

gulp.task('build', function () {
  return gulp.src('src/parser-factory.js', { read: false })
    .pipe(rollup({ external: ['request', 'cheerio'] }))
    .on('error', gutil.log)
    .pipe(babel({ stage: 0 }))
    .pipe(concat('realty-parser.js'))
    .pipe(gulp.dest('lib'));
});