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，那對貓會大有幫助，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，就不必再費大力氣。
新概念英語第四冊
Lesson 20 Snake poison
?? 句中詞匯解析
從本句中提取的重要詞匯
n. 例子，實例;情況;要求，建議;[法]訴訟手續(xù);
vt. 舉…為例;
?? in(upon)+stan(stand)+ce(名詞后綴)→建議；實例；訴訟程序；例證
"It is not a unique instance , but has its counterpart."
無獨有偶.
近義：exemplify, occurrence, example, occasion, opportunity, case
n. 努力，嘗試;工作;成就;杰作;
?? ef出+fort強大，力量→出力→努力
"She made a feeble effort to get to school on time."
她努力想按時趕到學(xué)校,但未成功.
近義：intent, pledge, pull, push, spirit, struggle
反義：heartsickness, hopelessness, intimidation, lassitude, tiredness, weariness
adv. 大大地，非常;
"The prospect of a year in India greatly excited her."
有望在印度待上一年使她激動萬分。
近義：highly, hugely, immensely, largely, mighty, astronomically
n. 跑步;運轉(zhuǎn);流出;
adj. 跑著的;流動的;連續(xù)的;操作中的，運轉(zhuǎn)著的;
v. 跑;運轉(zhuǎn)(run的ing形式);
"He kept up a running commentary on everyone who came in or went out."
他不斷地對上下場的每一名隊員進行解說。
近義：march, operation, race, run, working, footrace
反義：lagging, leisurely, phlegmatic, poky, slowish, sluggardly
adv. 大大地;夸大地;詳細地;順風地;
adj. 大的;大規(guī)模的;大型號的;廣泛的;
v. 玩?zhèn)€痛快;（尤指跳舞和飲酒）作樂;
"The two large classrooms have been assigned to us."
這兩間大教室分配給了我們。
近義：major, sizeable, big, sizable, some, capital
反義：small