Switch won't reveal what's in the proprietary mix, other than to say that it's cheap and environmentally benign.

Switch不肯透露这一专利，但表示它很廉价，对环境没有破坏。

youdao

Switch won't reveal what's in the proprietary mix, other than to say that it's cheap and environmentally benign.

Switch不肯透露这一专利，但表示它很廉价，对环境没有破坏。

youdao