Tetrose
n. [化]四糖
??? 情景例句
He doesn't take me seriously.
他對(duì)我沒有誠意。
She is a reliable assistant.
她是個(gè)可信賴的助手。
And why only snakes? Cats, for instance, would be greatly helped; no running fights with large, fierce rats or tussles with grown rabbits -- just a bite and no more effort needed.
為什么只有蛇才有毒液呢？譬如說，如果貓有毒液，那對(duì)貓會(huì)大有幫助，它就不必再和又大又兇的老鼠邊跑邊博斗了，也不必再和大兔子扭斗了，只要咬一口，就不必再費(fèi)大力氣。