betray/cheat on/grass on/rat.导航词义：背叛

1. betray:v. 背叛；出卖；泄露.主要指不忠于誓约或辜负信任；也可以指有意泄露秘密或出于无意暴露隐蔽的事物。

He betrayed his country.

他背叛了祖国。

She betrayed the secrets of her company.

她泄露了公司的秘密。

A visible antler behind the tree betrayed the presence of the deer.

树后面露出的角暴露了鹿的藏身之地。

2. cheat on:phr. v. 对…不忠.尤指对配偶或性伴侣不忠。

His wife has no idea that he has been cheating on her all along.

他的妻子不知道他一直对她不忠。

He claims that almost half of the women there cheat on their partners.

他声称那里的妇女几乎有一半对自己的伴侣不忠。

3. grass on:phr. v. 告密，告发.主要指向警方告发某人的违法活动。

He grassed on other accomplices.

他告发了其他同伙。

4. rat:v. 告发，告密；;背信弃义.主要指向掌权者告发某人，也指违背所作的承诺，常后接介词 on。

They tried to find out who had ratted on them.

他们试图找出是谁出卖了他们。

They accused the local government of ratting on its promises.

他们指责当地政府没有履行承诺。

全部

1·He held his breath as a rat scuttled past.

见一只老鼠跑过，他屏住了呼吸。《牛津词典》

2·The brown rat has prominent ears and a long scaly tail.

灰鼠长着两只突出的耳朵和一条带鳞片的长尾巴。《柯林斯英汉双解大词典》

3·Suddenly the rat cried, Hooray!

突然，老鼠大喊了一声：“万岁！”

4·The rat looked around him.

老鼠环顾四周。

5·But the rat wouldn't listen to her.

但是老鼠不听她的话。

6·Cat, cat, eats that rat!

小猫小猫吃老鼠。

7·And this is a fast rat.

这只老鼠跑得快。

8·Mr. Rat, Mr. Rat, I'm near the river.

老鼠先生，老鼠先生，我在河边。

9·A rat? Yes, a rat. Right next to you.

老鼠？对，一只老鼠，就在你身旁。

10·The rat is in the boot.

老鼠在靴子里。

大鼠

1·Is its expression pattern different in the human than in mouse, rat, or chimp?

它在人类身上的表达模式与在老鼠、大鼠或黑猩猩身上的不同吗?

2·The objective is to establish a model of spinal cord organotypic culture in vitroof Sprague Dawlay rat.

目的是通过器官培养的方法建立大鼠器官型脊髓片培养模型。

3·The objective was to investigate the effect of cauterizing stapedial artery on rat hearing and inner ear structures.

目的是探讨处理镫骨动脉对大鼠内耳解剖结构和功能的影响。

4·The viability of rat glomerular endothelial cells was inhibited by ioversol in a concentration and time dependent manner.

非离子型低渗造影剂碘佛醇能显著降低大鼠肾小球内皮细胞存活率，并呈剂量和时间依赖性。

5·It shows the role of TNF-alpha and its receptors in the production of beta-1,4 galactosyltransferase I and V mRNAs by rat primary astrocytes.

这显示了巢蛋白和阶段特异性胚胎抗原-1在大鼠2型星形胶质细胞中的表达。

鼠

1·The brown rat has prominent ears and a long scaly tail.

灰鼠长着两只突出的耳朵和一条带鳞片的长尾巴。《柯林斯英汉双解大词典》

2·It was the water rat!

原来是河鼠！

3·The Rat only said, Please, Badger.

水鼠只是说：“求求你，獾子班杰。”

4·The Rat came closer and examed him.

水鼠走近他，仔细打量他。

5·You are, indeed, said the Rat.

“你说得对。”水鼠说。

耗子

1·People think I'm sick for having a rat as a pet.

人们认为我养只耗子当宠物是变态。《牛津词典》

2·I was trying to catch a rat, but somehow he came nosing around and got in my trap.

我想逮的是耗子，可它不知怎么跑到附近，踩进了我下的夹子。

3·Cat, cat, cat, catch that fat rat!

猫，猫，猫，抓住那个大肥耗子！

4·If you have a tame rat, you can train it with small obstacles.

如你有一驯服的耗子，你能训练它越障碍。

5·From seven to eight, Wilbur planned to have a talk with Templeton, the rat that lived under his trough.

从七点到八点，威伯打算和住在他的食槽下面的耗子坦普尔曼谈天儿。

叛徒

1·A 'rat' will do anything to survive, even betray his friends.

“叛徒”为了生存什么都会做，甚至是出卖他的朋友。

2·I didn't do time with you guys, it doesn't make me a rat... I make one little mistake and all of a sudden I'm Judas?

我没跟你们一起蹲过监狱，不表示我就是个叛徒了……我就犯了这么一丁点儿错，然后一下子我就成了犹大了我？

(1)smell a rat感到不妙；感到有可疑之处

(1)rat racen. [俚]激烈竞争（商业上）；无意义的竞争；[电]环形导波管

(1)like a drowned rat浑身湿透（象落汤鸡）

(1)rat poison杀鼠剂，老鼠药；鼠毒

(1)pack rat不可靠的人，有敛癖的人

(1)white rat白鼠