•There is concern that the giant panda will soon become extinct.有人担心大熊猫很快就会绝种。

•Many tribes became extinct when they came into contact with Western illnesses.很多部落由于感染西方人的疾病而受到灭顶之灾。

•A lot of trades have become extinct because of the development of technology.由于科技的发展很多行业都消失了。