八成取自養殖場
Humans began wearing fur to protect against the cold during the Stone Age.
人類在石器時代便開始穿皮草保暖。
protect against sth.=保護免於~
At that time, the fur was simply obtained from the wild animals that they hunted, but as the human population grew, so did the demand for fur.
當時皮草僅取自獵物的皮毛，但隨著人口增長，對皮草的需求也跟著提高。
obtain(v.)取得;獲取hunt(v.)狩獵;打獵demand(n.)需求(量)supply(n.)供給(量)
Throughout much of the United States’ history, the fur trade had a strong influence on the economy.
綜觀美國歷史，皮草交易對經濟有極大的影響。
trade(n.)貿易;交易have an influence on=對~有影響
For many years, fur trappers set up traps to capture animals such as lynxes and beavers.
多年來，捕獸者設下陷阱捕捉猞猁、河狸等動物，
trapper(n.)捕獸者trap(n.)陷阱;捕捉器(v.)設下陷阱;捕捉capture(v.)捕捉
Furs and leathers also came from livestock such as sheep, rabbits, cows, pigs and goats.
而皮草與皮革也取自綿羊、兔子、牛、豬以及羊等家畜。
livestock(n.)家畜
However, in the latter half of the 20th century, animal rights activists began to protest the use of fur in clothing due to the cruel trapping practices and the widespread availability of cheap fur substitutes made from cotton or hemp.
然而，在20世紀下半葉，由於捕捉的做法相當殘忍，加上棉花與麻這類較便宜的替代品已越來越普及，動保團體開始抗議以皮草製成服裝。
protest(v.)(n.)抗議practice(n.)慣例;做法availability(n.)可得性substitute(n.)替代品be made from=由~製成的
Furthermore, certain species were becoming endangered because of the high demand of their fur.
此外，有些動物因為皮草的高需求而瀕臨絕種。
endangered(adj.)瀕臨絕種的
Now, the demand for fur has decreased so much that fur trappers can hardly make a profit from their catches, and 80 percent of the fur used in the clothing industry come from animals raised on farms.
如今，皮草的需求已大幅降低，以至於捕獸者無法從中牟利，而服飾產業現在用的皮草八成取自養殖場的動物。
so…that=如此~以致於~make a profit from=從~牟利raise(v.)飼養;養殖