credulous

形容词 credulous:

1. disposed to believe on little evidence
2. showing a lack of judgment or experience

1. They are credulous people who believe in the advertisement.
   他们是一些轻信广告的人。

cred.u.lous

adj.（形容词）
Disposed to believe too readily; gullible.
太容易相信的；易受骗的
Arising from or characterized by credulity.See Usage Note at credible
轻信的：由轻信而引起的或以轻信为特征的参见 credible

来源：
From Latin crôdulus
源自 拉丁语 crôdulus
from crôdere [to believe] * see kerd-
源自 crôdere [相信] *参见 kerd-

【引伸】
cred.ulously
adv.（副词）
cred.ulousness
n.（名词）