句子的主干:It's as if they were cosmic beings.
這是一個(gè)主系表句型:It(主語(yǔ))+ is(系動(dòng)詞)+(表語(yǔ)從句)as if they were in some sense cosmic beings in violent and lovely contrast with us suburban creatures.
在表語(yǔ)從句中,as if是引導(dǎo)表語(yǔ)從句的連詞;
they were cosmic beings是表從的主干,也是一個(gè)主系表結(jié)構(gòu);
in some sense是狀語(yǔ);
in violent and lovely contrast with us suburban creatures是介短作定語(yǔ),修飾cosmic beings;
其中,in contrast with是一個(gè)固定短語(yǔ),violent and lovely是作定語(yǔ),修飾contrast; 句末的suburban creatures是us的同位語(yǔ).
句意:從某種意義上講,他們似乎是宇宙人,同我們這些凡夫俗子形成了強(qiáng)烈而鮮明的對(duì)照.