英文: 121 At various times in the geological past, many species have become extinct
as a result of natural, rather than human, processes.
中文: 在过去不同的地质时期，很多物种的灭绝都是自然因素造成，而并非人类行为。 更详细...
英文: A lot of birds are extinct
中文: 许多鸟兽现已绝种。 更详细...
英文: A species becomes extinct
when the last individual dies.
中文: 当最后一个个体死了，一个物种灭绝。 更详细...
英文: A species would be extinct
if they can't produce their descendants during every generation.
中文: 一个动物物种如果不能在每一代生育足够数量的后代,那它就要灭绝. 更详细...
英文: Adding this reagent to seven kinds milled rice with different fatty acid values, it is hind that the extinct
in fresh rice became green and the extinct
in aged rice became yellow.
中文: 将试剂加入7种不同脂肪酸值的大米样品中，新鲜大米浸出液为绿色，陈化大米浸出液为黄色。 更详细...