1. He gestured to Alice to precede them from the room. 他示意艾丽斯从房间里出来走在他们前面。
2. Capitalize all proper nouns but not the articles (a, an) that precede them. 把所有的专有名词大写，它们之前的冠词(a, an)则不用。
3. This factor must precede an ice age and have the effect of slightly lowering Earth's temperature. 这一因素一定出现在冰川期之前，并有稍微降低地球温度的效果。
4. Because node structures go in only one direction, they know nothing about the sequence of nodes that precede them. 由于节点结构只指向一个方向，所以它们完全不了解它们之前的节点的顺序。
5. Their yawning seems to have nothing to do with sleepiness or boredom—quite the reverse—but it does precede a change in activity level. 他们打哈欠似乎与困倦或者无聊没有任何关系，但恰恰相反，打哈欠这一行为的确出现在了活动水平的变化之前。
