In recent years, as an effective method to avoid risk or speculation have rapid development.

近年来，期权作为一种防范风险或投机的有效手段得到了迅猛发展。

youdao

In recent years, as an effective method to avoid risk or speculation have rapid development.

近年来，期权作为一种防范风险或投机的有效手段得到了迅猛发展。

youdao