The psychology of "free" is powerful indeed, as any marketer will tell you.

“免费”心理学无比强大；任何营销人员对此必深有体会。

youdao

The psychology of "free" is powerful indeed, as any marketer will tell you.

“免费”心理学无比强大；任何营销人员对此必深有体会。

youdao