GRE重点词汇解析：tenuous

　　1) thin in form or density; lacking substance, strength, clarity, or a sound basis in reasoning

　　2) (adj.) thin, slim, delicate; weak

　　Tenuous ---- flimsy; not solid

　　tenuous ---- having little substance or significance

　　Tenuous ----- Adj. Having little substance or strength, flimsy, weak or rare

　　Syn: flimsy, rare; questionable, unsubstantial, vague, weak, gossamer

　　tenuous <> substantial

　　We questioned her tenuous reasons for her three-day absence, but she refused to clarify her story.

　　The hurricane force winds ripped the tenuous branches from the tree.

　　The spectators panicked as they watched the cement block dangle from one tenuous piece of twine.