一、含义不同

1、crocodile的含义：鳄鱼；(做成皮革的)鳄鱼皮；成对纵列行进的人(尤指儿童)。

2、alligator的含义：短吻鳄；钝吻鳄。

二、用法不同

1、crocodile的词性是名词，基本意思是“鳄鱼”，复数形式是crocodiles。

例句：Use the crocodile clips to attach the cables to the battery.

用鳄鱼嘴夹把电缆接到蓄电池上。

2、alligator有名词和形容词两种词性，用作名词时表示“短吻鳄”，是可数名词，复数形式是alligators；用作形容词时表示“鳄鱼皮的”的意思。

例句：Alligator lives in the rivers and lakes in the hot wet parts of America and China.

短吻鳄产于美洲和中国的江湖及湿热地带。

三、侧重点不同

1、crocodile是鳄鱼的总称，不管什么种类的鳄鱼都可以用这个词。

2、alligator是特指短吻鳄，嘴部较短且宽，根据分布地域的不同，分为American alligator（美洲鳄），体长1.8-3.7米；Chinese alligator（扬子鳄），体长不超过1.5米。

1、The alligator's jaws snapped shut.

钝吻鳄的嘴吧嗒一声闭上了。

2、He was grappling with an alligator in a lagoon

他正在环礁湖里与一只短吻鳄搏斗。

3、This paper the morphology of gastric glands and mucous surface in the hatchlings of alligator sinensis.

本文观察了初孵扬子鳄胃粘膜表面及胃腺的形态。

4、Alligator skin is five times more costlier than leather.

鳄鱼皮比通常的皮革要贵5倍

5、See?It's got a little alligator on top.

看到了吗？顶上有条小鳄鱼。

6、Did he really say,See you later,alligator?

他果真说了回头见或再见啦？

7、Analysis on the survival environment affecting wild Chinese Alligator

影响野生扬子鳄生存的环境因素分析

8、Structure and early embryonic development of inner ear of Alligator sinensis

扬子鳄内耳的组织结构及其早期胚胎发育

9、The Population Dynamics and Survival Strategy of Wild Chinese Alligator

野生扬子鳄种群动态及其生存对策

10、Regression equations between body measurements in the young Chinese Alligator

扬子鳄幼鳄身体量度间的回归参数分析

11、The genetic conservation research of Alligator sinensis was also proposed in the present paper.

目前对中国扬子鳄的遗传结构尚无人研究。

12、To have a pet alligator symbolizes great control over one's problems.

有一个宠物鳄鱼，象征着伟大的控制权一的问题。

13、Intestinal structure of Alligator sinensis before two years old

2龄前扬子鳄肠道的年龄结构变化

14、I filled a paper bag full of things alligator like to eat.

我装了满满一纸袋食物，都是鳄鱼喜欢吃的。

15、Reflect the genetic polymorphism of the Chinese alligator population is very low.

反映了扬子鳄种群非常低的遗传多态性。

16、The Chinese Alligator species identification and genetic research to provide a new DNA molecular markers.

本研究为扬子鳄品种鉴定和遗传研究提供了新的DNA分子标记。

17、As in humans,white cells are part of the alligator's immune system.

对于人类来说，白细胞是鳄鱼的免疫系统一部分。

18、Hot Remained Water Toughening Treatment for Large Scale Alligator Board in EPC Processing

消失模铸造大型高锰钢颚板的余热水韧处理

19、Conclusion:The development of Alligator.

结论：扬子鳄大脑皮层各部分的胚胎发育具不同步性。

20、Research on the Cause of Compacted Yolk During Artificial Culture of Young Chinese Alligator

人工饲养幼鳄出现卵黄硬结原因的探讨

1、Use the crocodile clips to attach the cables to the battery.

用鳄鱼嘴夹把电缆接到蓄电池上。

2、The crocodile's tail was lashing furiously from side to side.

鳄鱼的尾巴在急速地左右甩动。

3、A crocodile was lurking just below the surface.

有条鳄鱼就潜伏在水面下。

4、An operation is beginning to try to save a species of crocodile from extinction

一项努力拯救一个鳄鱼物种、使其免于灭绝的行动已经开始。

5、The sight of George shedding crocodile tears made me sick.

看到乔治假慈悲，我感到恶心。

6、That was real crocodile skin.

那是真正的鳄鱼皮。

7、The children walk in crocodiles from the schoolhouse to the dining-room for lunch.

孩子们排队从校舍去餐厅吃午饭。

8、Crocodiles bask on the small sandy beaches.

鳄鱼在小沙滩上晒太阳。

9、It would hardly be up to that crocodile standard.

它恐怕很难符合那个假善人的标准。

10、They weep crocodile tears for the poor.

他们对穷人是假慈悲。

11、The crocodile is a strange-looking creature.

鳄鱼是一种模样古怪的动物。

12、The Wildlife Park has plenty of freshwater and saltwater crocodiles.

野生动物园有很多淡水和咸水鳄鱼。

13、There are over 600 animals there,including kangaroos,koalas and crocodiles.

那里有600多种动物,包括袋鼠、考拉和鳄鱼。

14、Crocodiles and hippos live in its waters.

鳄鱼和河马生活在它的水域里。

15、The crocodile has a long mouth.

鳄鱼有很长的嘴巴。

16、The antelope could not escape the crocodile's gaping jaws.

那只羚羊无法从鳄鱼张开的大口中逃脱

17、My favorite animal is the crocodile.

我最喜欢的动物是鳄鱼。

18、An appeaser is one who feeds a crocodile--hoping it will eat him last.

绥靖者是纵恶的喂鳄鱼的人——希望鳄鱼最后一个吃他。

19、Snakes,lizards6 and even crocodiles can die if they ingest the amphibian's deadly toxin7.

如果摄入了这种两栖动物的致命毒素，蛇、蜥蜴，甚至鳄鱼都可能会被毒死。

20、Snakes and crocodiles are both reptiles.

蛇和鳄鱼都是爬行动物