The process was extremely difficult and expensive, says Webber, but the technology has moved on.

韦伯说，这个过程极其困难和昂贵，但技术已经进步了。

youdao

The process was extremely difficult and expensive, says Webber, but the technology has moved on.

韦伯说，这个过程极其困难和昂贵，但技术已经进步了。

youdao