磁铁

You can magnetize a needle by rubbing it with a magnet.

用磁磨擦针可使之磁化。

He picked all the pins up with a magnet.

他用磁捡起了所有的大头针。

We know about magnetism by the way magnets act.

们通过磁的作用知道磁性是怎么一回事。

Polarity is inherent in a magnet.

极性是磁的固有性质。

In silicate minerals and magnetites existed isomorph tin.

硅酸盐物和磁中都存在类质同象态锡。

This paper presents a microstroke mechanism driven by electromagnets and its control circuit design.

介绍一种电磁驱动的微进给机构及其控制电路设计。

A magnet has polarity.

磁具有极性。

The rabbits in our backyard were a magnet that attracted all the children in the neighbourhood.

家后院的兔子像磁一样吸引着邻居所有的孩子。

The electro-magnetic microgenerator utilizes a moving magnet or coil for inducing an alternating electric current in a circuit.

微型电磁发电器以移动中的磁或线圈，在电路中制造出感应交流电。

Rare earth metals, such as metallic neodymium and metallic didymium (metallic praseodymium-neodymium), are used for rare earth magnets, mainly neodymium-iron-boron magnet.

稀土属，如属钕和属皮（属镨，钕） ，用于稀土磁，主要钕硼磁。

Quartz, zircon, magnetite, gold are major constituents of littoral placers in Shandong province, while shell, ballstone, ilmenite, rutile being secondary.

山东省滨海砂以石英、锆英石、磁、砂等为主,其次为贝壳、球石、钛、红石等。

Apart from magnetite and almandine garnet, the skarn also contains these minerals: idocrase, actinolite, epidote, fluorite and andradite (another garnet mineral).

主要构成物除磁和铝榴石外，矽卡岩尚有其他物如符山石，阳起石，绿帘石，萤石及钙榴石。

The main structure have:Electromagnet and Heng galvanism source, numerical type Gauss account(the effect of Huo Er) and ammeter and volt account, have control dish of illuminate the system.

电磁和恒流电源、数字式高斯计 （霍尔效应）、安培计和伏特计、配有照明系统的控制盘。

For sinter with 25% and 50% MAC fines the iron oxides mainly consisted of hematite and magnetite, the bonding phase were mainly dicalcium silicate, glassiness, and a few amount of calcium ferrite.

配比为25%和50%的两种烧结中氧化物均以赤、磁为主，粘结相主要以酸钙、硅酸二钙和玻璃质为主，但酸钙数量不多。