一：rat是什么意思？用法、例句的意思

rat作为名词，有多种含义。首先，它可以指代一种啮齿动物，通常生活在城市或农村的建筑物中，具有灰色或棕色的毛发和长尾巴。其次，它也可以指代背叛者、叛徒或告密者。此外，rat还可以作为动词使用，表示偷窃、背叛或告密的行为。

二：怎么读（音标）

rat的音标为 /ræt/。

三：用法

1. 作为名词：

(1) 指啮齿动物：The laboratory has a group of rats for experiments. (这个实验室有一群老鼠用于实验。)

(2) 指背叛者、叛徒：He is a rat, he betrayed his friends. (他是个叛徒，背叛了他的朋友。)

(3) 指告密者：She is afraid that someone will rat on her to the police. (她担心有人会向告发她。)

2. 作为动词：

(1) 偷窃：The burglars ratted the house while the owners were away. (在主人离开时，小偷们进了房子偷东西。)

(2) 背叛：I trusted him, but he ratted me out to the boss. (我信任他，但他背叛我向老板告发。)

(3) 告密：The gang members were afraid that one of them would rat on them to the police. (帮派成员们担心有人会向告发他们。)

四：例句1-5句且中英对照

1. The farmer set up traps to catch the rats in his barn.

农民在谷仓里设置了陷阱来捕捉老鼠。

2. The spy was a rat who gave away classified information to the enemy.

那个是个叛徒，向敌人泄露了机密信息。

3. Don't be a rat, keep our secret safe.

不要做背叛者，保守我们的秘密。

4. The thieves ratted the store and stole valuable items.

小偷们闯进商店偷走了贵重物品。

5. If you rat on your friends, you will lose their trust forever.

如果你告发你的朋友，你将永远失去他们的信任。

五：同义词及用法

1. mouse：指小型啮齿动物，比rat更常见。：The cat caught a mouse in the kitchen. (猫在厨房里抓到一只老鼠。)

2. betrayer：指背叛者、叛徒，与rat含义相同。：He was seen as a betrayer by his former colleagues. (他被他的前同事视为叛徒。)

3. snitch：指告密者，通常带有贬义。：The criminals were caught because someone snitched on them to the police. (这些罪犯住是因为有人向告发了他们。)

六：编辑总结

rat这个词既可以作为名词，也可以作为动词，具有多重含义。作为名词时，它可以指代啮齿动物、背叛者或告密者；作为动词时，则表示偷窃、背叛或告密的行为。在使用时需要根据具体语境来确定其含义。此外，它还有一些近义词如mouse、betrayer和snitch，但它们的用法和含义可能略有不同。