This idea of pre-assembling bits of the fire engine has made only fitful progress.

这种待命(pre -assembling)消防车的想法也仅仅取得了一些间或性的进展。

youdao

This idea of pre-assembling bits of the fire engine has made only fitful progress.

这种待命(pre -assembling)消防车的想法也仅仅取得了一些间或性的进展。

youdao