574. magnet n. 磁铁，磁体

The pin can be extracted with a magnet.

用一块磁铁就能把那根针吸过来。

575. male a. 男性的，雄的

Why does the author congratulate his male readers at the beginning of the passage?(2008年12月大学英语四级考试真题)

576. female a. 女性的，雌的

How can you tell if a swan is female?

我怎么才能知道一只天鹅是雌的还是雄的呢？

577. manual a. 用手的，手工做的 n. 手册

Some of the packs do not contain any manuals. (2009年6月英语四级考试真题与答案)

Manual workers (2006年12月24日大学英语四级(CET-4)真题试卷(A卷))

578. manufacture vt. /n. 制造，加工

This steel is manufactured from Swedish iron.

这种钢材是用瑞典的铁炼制的。

In design and quality of manufacture they are outclassed by the Italian. 在产品设计和质量上，意大利人大大超过了他们。

579. marine a. 海的；海产的

Seals and whales are marine animals.

海豹和鲸鱼是海洋动物。

580. mutual a. 相互的

That of course need mutual efforts.

这当然需要共同的努力。

581. naked a. 裸露的

Whoever it is, they will see you in a way you never intended to be seen-the 21st century equivalent of being caught naked. (2008年6月大学英语四级考试真题)

582. negative a. 否定的，消极的

On average, every unhappy customer will complain to at least four other, and will no longer visit the specific store for every disatisfied customer, a store will lose up to three more due to negative reviews. The resulting “snowball effect” can be disastrous to retailers. (2008年12月大学英语四级考试真题)

583. neglect vt. 忽视，忽略

He was dismissed for neglecting his work.

他因玩忽职守而被炒了鱿鱼。

584. origin n. 起源，出身

Arabic spoken in Egypt differs from Arabic spoken in Morocco in origin. (2006年12月23日大学英语四级(CET-4)真题试卷(B卷))

585. oval a. 椭圆形的 n. 椭圆形

Our table is oval in shape.

我们的桌子是椭圆形的。

586. outset n. 开始，开端

You should explain this to him at the outset.

你应该一开始就向他解释这一点。

587. presumably ad. 大概，可能

This proposal will presumably cause a lot of reaction.

这个提案可能会引起许多的反应。