美國科學家=Drs. Wall and Wani.

上世紀60年代，美國科學家發現... 美國科學家=Drs. Wall and Wani.

when reviewing history, proper credit should be given to those who deserve it. but it is ok since this is a mere informercial.

Consequently the treatment of one cancer patient consumes approximately eight 60-year old yew trees.

eight 60-year old yew trees= 6 100-year old yew trees

https://www.news-medical.net/health/Paclitaxel-Production.aspx