a.

1. 简单的，简易的，简明的
   Such a toy is simple to make.

   这种玩具做起来很简单。

2. 单纯的，朴实的；天真的
   My aunt has a simple heart.

   我姑妈有一颗单纯的心。

   She's so simple she'll believe anything you tell her.

   她十分单纯，你跟她说什么她都会相信。

3. 坦率的，善良的
4. 完全的，纯粹的[Z]
   His statement was simple racism.

   他的陈述纯粹是种族歧视。

5. 结构单一的，不可分割的[Z]
6. 低微的；普通的，不重要的
   My sisters are both simple office workers.

   我两个妹妹都是普通的公司职员。

7. 头脑简单的，愚笨的
   It was simple of her to waste her money on such trifles.

   她把钱浪费在购买那种没用的玩意上，真是愚蠢。

n.[C]

1. 单一体；单一成分的食品（或药品）
2. 智能低下者，笨蛋
3. 愚蠢的行为[P]
   She talked like she'd got the simples.

   她说话像犯了傻似的。

4. 【古】草药
5. 【古】出身（或地位）低下者

adj.

1. easily understood or done.
2. plain and uncomplicated in form, nature, or design.
   ▸humble and unpretentious.
3. composed of a single element; not compound.
   ▸Botany  (of a leaf or stem) not divided or branched.
   ▸(of a lens, microscope, etc.) consisting of a single lens or component.
4. of very low intelligence.
5. (in English grammar) denoting a tense formed without an auxiliary.
6. (of interest) payable on the sum loaned only. Compare with compound¹.

n.