A．签署(法案) B．由……而产生；接着……发生
C．基于 D．反抗；抵抗 E．为……争取支持
F．归因于；归结于 G．阐明；帮助理解 H．在很多方面
I．起……的作用；担任 J．把……搪塞过去；无视 The possibility of extraterrestrial life being based
on these "alternative" biochemistries is a common subject in
science fiction, but is also discussed in a non-fiction scientific context.