Para.6 1.Absence of evidence is not evidence of absence The fact that we do not have evidence showing there is life beyond Earth does not mean that we can come to the conclusion that there is actually no life beyond Earth. 2.But still .starship So far we do not know firmly and dependably that there exists a single microscopic organism in another world,to say nothing of a starship coming from another world,the universe passing the Earth Para.7 1.What is“plausibility arguments”？ It means reasons offered which appear to be convincing but which may not be tru 2.What is"random ought-to-bes"? It means possible things which are chosen without specific aim 3.We don't know.we don't know. We do not know of this life depends on water in liquid form for existence or if it lives in the water like fish or in the air like birds or under the earth like gophers. Para.8 1.This paragraph serves as a transition,moving from speculation to naming the field of research. 2.What is meant by "the enveloping nebula of uncertainties"? It introduces two ideas:the first is the cloud of gas and dust obscures things;the second is,as a result,it is unclear what has been wrapped up in the cloud of gas and dust,what is inside the enveloping nebula Para.9 1.In the past decade.in bizarre,hostile environments. If organism could thrive in conditions in this world similar to hostile conditions in other planets,then the possibility of the existence of alien life increases Para.10 1.Why is"full-scale invasion"? The author uses this phrase in a humorous way,camparing the full-scale investigation and study of Mars to full-scale invasion.With one scientific instrument after another Para. 6 1. Absence of evidence is not evidence of absence The fact that we do not have evidence showing there is life beyond Earth does not mean that we can come to the conclusion that there is actually no life beyond Earth. 2. But still . starship So far we do not know firmly and dependably that there exists a single microscopic organism in another world,to say nothing of a starship coming from another world,the universe passing the Earth. Para. 7 1. What is “plausibility arguments” ? It means reasons offered which appear to be convincing but which may not be true. 2. What is “random ought-to-bes”? It means possible things which are chosen without specific aim 3. We don’t know . we don’t know . We do not know of this life depends on water in liquid form for existence or if it lives in the water like fish or in the air like birds or under the earth like gophers. Para. 8 1. This paragraph serves as a transition,moving from spe culation to naming the field of research. 2. What is meant by “the enveloping nebula of uncertainties”? It introduces two ideas:the first is the cloud of gas and dust obscures things;the second is ,as a result,it is unclear what has been wrapped up in the cloud of gas and dust,what is inside the enveloping nebula. Para. 9 1. In the past decade . in bizarre,hostile environments. If organism could thrive in conditions in this world similar to hostile conditions in other planets,then the possibility of the existence of alien life increases. Para. 10 1. Why is “full-scale invasion” ? The author uses this phrase in a humorous way,camparing the full-scale investigation and study of Mars to full-scale invasion.With one scientific instrument after another