You can use both as and like to say that things are similar. * as 和 like 均可表示相似。

• Like is a preposition and is used before nouns and pronouns. * like 为介词，置于名词和代词前：◆He has blue eyes like me. 他和我一样有双蓝眼睛。
• As is a conjunction and an adverb and is used before a clause, another adverb or a clause beginning with a preposition. * as 为连词和副词，置于从句、另一副词或以介词引导的从句前：◆She enjoys all kinds of music, as I do. 她和我一样什么音乐都喜欢。◆Repeat these five steps, as in the last exercise. 照前面的练习一样，重复这五个步骤。
• In informal English like is frequently used as a conjunction or an adverb instead of as. 在非正式英语中，like 常常代替 as，用作连词或副词：◆Nobody understands him like I do. 谁都不像我那么了解他。◆I don't want to upset him again like before. 我不愿意再像过去那样使他扫兴。 It is also used instead of as if. * like 亦可用以代替 as if：◆It looks like we're going to be late. 看来我们要迟到了。 These uses of like are common but are not considered correct in formal written English. * like 的这类用法很常见，但在规范的书面语中被视为不正确。

You will find more help on the use of as and like in the entries for particular verbs, such as act, behave, etc. 关于 as 和 like 的其他用法，参见 act、behave 等动词词条。

Describing a process 描述过程

• ◆This diagram illustrates the process of paper-making./This diagram shows how paper is made. 这个图说明了造纸的过程。
• ◆ First / First of all, logs are delivered to a paper mill, where the bark is removed and the wood is cut into small chips. 首先，原木被运送到造纸厂，在那里去掉树皮，然后被切成木片。
• ◆ Next / Second, the wood chips are pulped, either using chemicals or in a pulping machine. 接下来，用化学品或磨浆机把木片化成浆。
• ◆Pulping breaks down the internal structure of the wood and enables / allows the natural oils to be removed. 制浆过程使木材的内部结构分解，从而去除木材里的天然油。
• ◆ Once / After the wood has been pulped, the pulp is bleached in order to remove impurities. /…is bleached so that impurities can be removed. 木材制成浆后，将其漂白以去除杂质。
• ◆ The next stage is to feed the pulp into the paper machine, where it is mixed with water and then poured onto a wire conveyor belt. 下一步便是将纸浆送入制纸机，与水混合后再倒入金属传送带。
• ◆ As the pulp travels along the conveyor belt, the water drains away. This causes the solid material to sink to the bottom, forming a layer of paper. 当纸浆沿传送带传送时，水分蒸发，使得固体物质沉到底部，形成一层纸。
• ◆ At this point the new paper is still wet, so it is passed between large heated rollers, which press out the remaining water and simultaneously dry the paper/…dry the paper at the same time. 这时，新出的纸仍然是湿的，故让其经过几个巨大的热滚筒，挤压脱水并同时烘干。
• ◆ The final stage is to wind the paper onto large rolls./ Finally, the paper is wound onto large rolls. 最后一步是将纸卷在巨大的卷轴上。